Caithes, you started on Aspern so you started with full server demand being unmet. You were able to grow your airline to almost 300 aircraft, by adding flights. But I guess first month on Aspern even MCI to Cedar Rapids Iowa was full :) As you grew your airline, you built your network, so when the demand became met by supply, you already had a sizable network to support so many connecting passengers. Regardless of what anybody tries to say, there is economy of scale in AS, and big airlines feed one end of their route spectrum with passengers from other end of route spectrum.
What I found out about big hubs at server start (or when country opens up by major bankruptcy) is that the big hub should be your primary point of focus, because of huge O/D, which makes you money to then later expand and maybe build a hub out of really centralized location (e.g. for intra-European traffic, it's great to start at LHR, but for connections it's best to be in Zurich or Frankfurt, etc. [excluding slot considerations] because they are more centrally located). I guess the same goes for the USA. But this is on server start or when major liquidation occurs. It may still hold true that to get off the ground, a major market (9 bar demand) could get the airline through first few weeks.
It would be almost impossible to start at MCI or STL and make money on O/D traffic. Even if your flight gets to the top of the ORS on the first page, there are tens of thousands of connections where you simply do not get enough pax for O/D traffic unless you really depress the price and thus increase the first (connection-relevant) ORS rating. So without connections, you cannot make it in established market like USA or Europe. But (some) of the old servers have advantage of having used aircraft, which can be had for cheap, and you can immediately get maybe 15 x 737 classic and build the mini-network from day one.
[side note: on older servers some established airlines (e.g. since 2011 etc.) use 737 classic and there are NONE to be had on Used Market by new companies. If I was AS, I would offer "special type" of A320 or 737NG with slower speed, so old 733s/734s could be replaced by big players for 73Gs/738s without worrying about slots, thus freeing those planes for new players so they could compete with them, and I would make a rule that any airline over 2 years old must have new fleets...same as a rule was made that old seat configs must be changed by March 31, but this should go to the suggestion box anyway]
[here goes my observation, that excluding image factor for age, lease+maintenance on 20 y/o 733 = lease+maintenance on new 73G, but 77 has the advantage that while you have to pay lease even if your aircraft sits for hours on ground to meet waves, maintenance is dependent on flying time. So underutilized 733 will be cheaper to operate than underutilized 73G...which is same as in real life e.g. Allegiant Air, again this formula is excluding image factors and slight "thingy" that started to appear in ORS since about a month ago that slower aircraft cannot reach 99 ORS on some routes in Y and on all routes in C, max goes to 98].
On older servers where there is limited supply of used aircraft, it is virtually impossible to start at 6-7 bar airport with new aircraft and make money, because again, you need immediate (as in from day one) network connecting to at least 10 or 15 destination with a wave.
CAITHES, one question, at the end here:
you wrote "Personally, I find the 'wave' template both tedious and unnecessary" does that mean that your airline is not using waves? Do you just schedule flights as the space in flight-plan becomes available until you reach the lowest maintenance ratio? I guess that with current saturation on Aspern, waves may become important. (I found it out myself with existing airline I play with, while the market was not saturated, waves did not matter much. With dropping AGEX and market becoming saturated, waves are very important, and flights that were out-of-wave synchronization are suffering decline in LF, while the best-wave-positioned flights are as strong as ever).
BTW, what value does AGEX have right now on Aspern?