I own a M1 Max 4TO 64gb Ram...a beast!
After the latest update of PR 25.5 the software is totally not working properly. I've been using it since 2007! And I always defended the software as being very stable, and i've worked with many heavy plugins in the past and present. Simple bug is the playback in Full resolution, timeline 4k with Sony s-log 4.2.0 rushes and the timeline is loosing a big amount of frames very impressive, even if i remove the high resolution preview and lower it to 1/2 it till have hard time sometimes. I even did not apply any color correction, nothing at all!
Many other issues, where it freezes for no reason, and without having a heavy work to really heating my laptop, the older version was perfect...waiting the new update hopefuly to have it fixed! My colleague do not have this issue so i guess it's unlikely to me.