sixchannel,
Can you elaborate?

I believe more, not less RT's were introduced in 2024 than prior year(s). And the price you pay for upgrade at promotional period is very reasonable considering amount of content (RTs, RDs and MIDI) you are getting. Consider software as a freebie. Of course you can wait to upgrade mid year (still get the "upgrade" discount) and have most new bugs of that year addressed.

What exactly is that you think would make you "relearn the System all over again"?
With exception of handful of people (about 5 to be more specific) that for very minor reasons didn't want to use new MTP Library, no major issues were reported specifically with 2024. Almost zero items concerning "new features" that "prevented" people from using BIAB. Nobody is forcing you to use new features. Ignore new buttons - problem solved!

New "features" aside, did you know that 2024 BIAB generates tracks about 5 times faster? If this was the only item on the table for 2024, I would still upgrade.

Having said that, I do agree with you that RT's should be backward compatible at least for 2-3 years of last version of software.