I appreciate the forthright statement, but I also urge you to reconsider; Apple Silicon is not a "new fad", and it's not a minor thing that your app only works with rosetta. It's most likely not super difficult to get it to build for arm64, though getting the universal binary set up might be a bit of a pain -- you could also just offer two downloads, though I know that has its own cost.
The problem is that to use lastpass on safari you have to run the lastpass app, which means basically keeping that open all the time; anything which requires rosetta 2 to function increases the drain on the battery and thus many people (myself included) prefer to avoid using any "long-running" applications which aren't running arm64 natively.
We're already at a point where nearly all currently sold mac systems run on apple silicon -- it isn't just a few users that you're affecting, though I recognize that the overall percentage of your userbase may still be small.
