Whats your use case?
Was somewhat recently considering a linux laptop myself and ended up deciding the steamdeck fit my needs well.
A dock + portable keyboard & mouse for when i need to do typing or w/e, and a fun handheld console for when i want fun.
That being said, depending on what your “older” laptop is, it might not actually be much stronger, or it might be wildly overpowered for what you need.
Top comment on the lemmy world this was cross posted with points out among other things that the app isn’t a system app and doesn’t otherwise have permissions to access most of what is claimed here, and from a cursory glance at the app on my phone that claim looks correct. is there something I’m missing or is this post just wrong?
Comment in question: https://discuss.tchncs.de/comment/16670102