I forgot to make a replacement for the "you couldn't ask for a lamer topic" thread, so here y'all go!
I really wish there was a 1-to-1 replacement for LINQPad on macOS/Linux. I've messed around with RoslynPad, but I always end up running into something that pushes me to fire up a Windows VM and use LINQPad instead. That's going to be a bit of an annoyance if I stick with MacBooks moving forward given the switch to ARM, though a lot can happen in a few years.
I might also see about contributing to RoslynPad after I push through a few of my personal projects.