MS Dos 5.0 on my first PC was a bit short on features and I had not enough money for Windows 3.1… I heard that American students were using something called Unix and that their was something close available through mail-order CDs. Yggdrasil CDs were cheap too!

A process owned by any user will be able to exploit a userspace vulnerability, whatever this user is. Selinux, chroot, cgroups/containerization add a layer of protection to this, but any vulnerability that bypass these will be as exploitable from nobody as from any other local user. It will protect a user files from some access attempts but will fail to prevent any serious attack. And as usual when it comes to security, a false sense of security is worse than no security at all.

Remember that some exploits exist that can climb outside of a full-blown virtual machine to the virtualisation host, finding a user escalation vulnerability is even more likely.

The only real protection is an up-to-date system, sane user behavior and maybe a little bit of paranoia.

Subjective take: there’s worse than FreeCAD - sure it’s a bit “old school” but it’s bearable. O. The other hand, the solver has crashed on me so many times… The workbench way of doing things requires some time to get usdmed to, sure, but a crashing solver is far worse.

That’s a lot of words for “I’m too lazy to master the most essential tool of my professional life and keep it updated to my requirements”.

If you don’t want to do it, feel free to pay an Ubuntu support subscription, open a ticket, and get back to work. As you said: you should be working on your problem instead of whining. Or maybe you earn more whining?

There’s a saying that goes like that: “To a bad workman, there’s always bad tools.”

On behalf of garbage, I loudly protest on this attempt to assimilate it to Powershell.