[pier25]

When you open Live 10 in Mojave you get this alert:

https://help.ableton.com/hc/en-us/articles/360003076340

[odmjoevpojewivf]

Interesting. So it's still mixed and has disadvantages of a 64 bit program (no 32 bit plugin support 1) and of a 32 bit program (no compatibility with Catalina) while pretending to be a 64 bit program. Sounds great!

1 at least on Windows