There's a new demo coming out on monday which has had tons of optimisation and fixes.
I don't think I've seen the crash from just going over the bridge yet.
We've been doing a lot of fixes for all the issues we've seen so far and think we've got most of them.
The Player Character has been rebuilt from the ground up, NPCs rebuilt, wolves and random Enemies rebuilt. Dialog system has had some work done to try and resolve that, but will probably rebuild that if it keeps causing issues. 4k textures have been removed. A big cause of RAM usage was characters holding other characters in memory. Most of that should now be fixed and only referencing characters when needed.
My hope is that the bulk of the issues have been fixed. The next update has been released on Patreon and as Early Access for almost a week now and there's been surprisingly few bug reports, and none so far for the recurring problems.
And rest assured, my GPU goes off like a jet engine as well, but I think that's because it's on its last legs anyway. I'm trying to find ways to optimise and stop mine doing it as well.