This is simply not true.
Ok, then try to run a pre-compiled macOS M1 compatible application on your new Sequoia system, such as https://github.com/rochus-keller/oberonsystem3/ or https://github.com/rochus-keller/leancreator/. Requires quite some tricks so that at least some applications run without Apple's benedictions, but the tricks don't work for all such applications; and as it looks, they will also remove the last remaining work-arounds in future.
- Unzip archive
- Try double-click, security error
- Go to Privacy & Security and click "Open anyway"
- Try double-click again, it opens fine.
ObreonSystem:
- Open DMG and copy all the files to a folder
- Try double-click, program opens fine but errors because missing files.
- Uses instructions given in README, running with './ObreonSystem', and program opens without errors.
macOS 26.0.1
Thanks. Unfortunately this no longer works on sequoia; you first have to run "spctl --global-disable" in a terminal and then - within a few seconds - go to Privacy & Security and select the new option in the popup menu (which was not available before). See also https://news.ycombinator.com/item?id=41184553. That's what I meant by "tricks". And even though there are apps which still didn't work. But fortunately I still have a Mac with an older OS version which I'm not going to upgrade.