Yes I know but the way I see sveltekit is that there are adapters for cloudflare etc. and I doubt how sveltekit can drift into such direction without immense blacklash
I don't know much about the nextjs and whether it was open like sveltekit currently is.
To me, nextjs (I think) was always meant to favour vercel but sveltekit has a rich history of managing multiple adapters.
Now, that being said there are still some chances of a rugpull that might happen but if that ever happens, I am staying on the last sveltekit that worked with cf and other cloud providers.
Only 3/40 Svelte maintainers work at Vercel and they mainly finance work on Svelte core. SvelteKit day-to-day is primarily maintained by folks outside Vercel
Rich and Simon are incredibly important, but they're in it for Svelte and the community more so than a paycheck from Vercel. Tee has been doing most of the maintenance on SvelteKit currently funded by community donations. And this isn't counting other infrastructure like vite-plugin-svelte or the Svelte CLI which are entirely maintained by volunteers. I don't think Vercel funds a majority of the work on Svelte even if it might be close to it.