With all the love in the world, that's probably down to the sunk-cost fallacy. You've invested a chunk of time into understanding the idiosyncrasies and non-standard methodologies that React has pushed at you over the years.

Svelte's pattern for data binding (with the exception of the $: reactivity) is exceptionally idiomatic and as close to standard web as 2-way reactivity will ever be. Easy to get to grips with as a newbie and a breath of fresh air for someone with years of fe experience under their belt.

Svelte embodies the KISS principle and long may that last.