I've been a Logic guy since version 4 (gold) or something...
- was very happy when we switched to mac (g4) from pc, it had a bit less jam but by goodness it worked
- was a bit sad when apple bought Emagic
- picked up a g5 and was very happy with the jam
- then sad we ran out of jam and couldnt upgrade anything
- happy at the switch to Intel, though it broke compatibility with UAD
- sad that apple slowed down the updates
- sad that apple refused to upgrade hardware
- starting building my own hardware, and was happy
- sad that apple's software quality has severely dropped, though Logic still works
That's about 20 years of use for Logic there. The program is advanced enough to not really need anything new, new hardware is available.
New chip architecture will surely break a lot of things, and there would be a major transition stage undoubtedly. Something tells me Apple is more likely to leave developers scrambling to recode, rather than provide another Rosetta. However Tim's style at Apple has been to seriously fragment the product lines, which may leave several models out there for quite a while.
Oh, the jokes, if after so many years of waiting for a Mac Pro update, we get an architecture change a year later.... Personally I'll be very disappointed to lose control over upgrades or experience a big upheaval to workflow, but we really aren't adequately using multicore processing right now. Floating point calculations in audio are 100% made for multicore, yet the design is extremely inefficient. Perhaps a switch, and a new plugin protocol will let you get 10yrs out of your hardware without needing an upgrade, or to turn off oversampling.
Audio software today is in a funny spot: You have Apple's Logic, a sidenote to the company for practically no money, which they could discontinue without a thought. Avid's competent but cashgrab PT, and the company is a bit of a mess. Steinberg is standalone, tough go for a company longterm.
Starting fresh, I'd jump on Reaper and Ableton, and not look back.