This would seem to be the the essence of the issue with all sidechains, and why they've failed to gain any meaningful traction.

Liquid, Drivechains, shitcoins, this thing.... they all ultimately come down to needing a swap in or out and the friction/cost/latency/network-effect associated with that.

As we know, there are exactly 0 use cases for a blockchain besides Bitcoin, so the added friction of a Bitcoin swap into a sidechain is all it takes to keep these things irrelevant.

Sidechains as a concept seem to be doomed by having the ceiling of offering only marginal utility gains, with the added burden of solving the swap problem in a meaningfully better way.