It was an expansion approximately every two weeks, with a bit of a story break during post-Endwalker to do other things.

But yeah I was definitely playing every single day (I still do, but dailies to level my remaining jobs are much less time-consuming...) from after dinner until bed...

Having to DC travel just to do content isn't great, for sure. I think I had to do that when unlocking the final EW raids a few months back.

Most of Omega can be unsynced with two people (I also had the 740 gear at the time). Not sure about O12S since I've only done that with a bigger group.

I've done E4S with three people and I suspect you could maybe do it with two.

Succeeding at Dualstar is indeed commendable.