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this is unfortunate, did they lower their limits in the move? I think they migrated from isolates to containers/VMs so that would check out

Mastro.{js,ts}

@mastrojs.bsky.social

Interesting! Is there anything publicly known about why they moved away from isolates? Seemed like that would give them better economics, and without they’re a hosting provider like any other?

They haven't published anything about "why we moved away from isolates", but they are happy to talk about the better Node compat, database support, and new CI/sandbox stuff that moving to VMs enables.

plus I think maintaining a whole second runtime for their cloud platform, and keeping it secure, just takes more engineering effort than they were willing to spend. unless you have Cloudflare's infra/scale/commitment I don't think building a platform like this on top of isolates is really viable.

4/4/26, 7:38 am0 reposts2 likes

Mastro.{js,ts}

@mastrojs.bsky.social

I had assumed they had organized the Deno codebase in a way that they can easily build the standalone binary and the isolates from the same core codebase. But perhaps that’s not possible for some reason?