My 2c of insight: I found Svelte's docs & examples greatly sweetened the on-boarding.
While I presume writing specs is a boring collateral, a friendly / bitesized / WISYWYG documentation would make a world of difference for the enthusiastic but less-than-ninjas of us.
The smarter kids can catch up faster, and some might not bother, already do react/vue. I personally found with Svelte a way tamer learning curve.