So, I work in a niche domain - scientific software.
For one thing, you can already get scientific libraries on Linux which run on ARM. That's not too much of an issue. BLAS is an API of which there are many implementations.
The issue is that
(a) it requires everyone to recompile everything
(b) projects which are 'legacy' and are no longer developed just won't ever switch, so that software won't be runnable. If Apple do a Rosetta equivalent, they'll run slowly, but if that project ends (like Rosetta), that software will just stop working. This is pretty much the same problem as where Apple have killed x86 - there are many apps that just no longer work.
For one thing, you can already get scientific libraries on Linux which run on ARM. That's not too much of an issue. BLAS is an API of which there are many implementations.
The issue is that (a) it requires everyone to recompile everything (b) projects which are 'legacy' and are no longer developed just won't ever switch, so that software won't be runnable. If Apple do a Rosetta equivalent, they'll run slowly, but if that project ends (like Rosetta), that software will just stop working. This is pretty much the same problem as where Apple have killed x86 - there are many apps that just no longer work.