Looks like Modo 17.1v1 - 26 November 2024 (what a fun naming convention) is supposed to get stability back, while keeping the perf boost vs 16x serie.
I haven't touch Modo for so long, the UI looks way more intimidating compared to 801 era ...
https://learn.foundry.com/modo/17.1v1/content/release_notes/17/modo_17.1v1_releasenotes.html

If it wasn't clear you can grab a copy here : https://support.foundry.com/hc/en-us/articles/360019180479-Q100595-Download-links-for-previous-Modo-versions
And the license here : https://campaigns.foundry.com/modo-eol-license

No need to have a Foundry account. (Thanks Greg Leuenberger from PixelFondue)