Regarding the first, the best I can offer is what many other project in this space say: “it’s just markdown files on disk, you can take them anywhere at any time”. Obviously this is only partially true, because the more SB-specific features you use, the more you get locked in. Your notes will never go away (if you back them up). But all time building queries and templates, would have been wasted.
Regarding company owned machines: a concern I heard for Logseq and Obsidian is that people cannot use them at work/with a work machine because they’re not allowed to install anything. For SilverBullet I’d recommend not installing it on your laptop (work or otherwise), but rather on some other machine. Perhaps you have a Raspberry Pi lying around unused. Or maybe you buy a cheap VPS (silverbullet.md itself runs on a $5/month Hetzner VM). Then you can access it from anywhere with a web browser, and I assume your work laptop has one of those.
Regarding the high pace of development: also fair. The reason I have not been very actively promoting SB so far is because of the high change churn rate. If you’re a power user, you kind of need to keep on top of stuff. Mostly I attempt to give people migration tools, but this is always a opportunity cost decision. Until recently some fundamentals still didn’t feel quite right (like the templates). I think we’re getting there now though. Another one I still need to figure out is how to do the distribution of templates, slash commands. This idea of a Library you import works, but you cannot easily keep it up to date. This so something to still figure out. Generally I’ll do my best to mark the parts of this that are experimental or prone to still change.