If syntax matters, JSX/TSX will forever reign supreme to DSL's like Angular's templating syntax and Svelte. Angular didn't even start shipping intellisense until years after they invented their markup, and it wasn't all that good: it would crash and use an appreciable amount of system resources. Language and library authors need to learn to meet people where they're at if they want actual market share. Some amount of change is good, but too much is a non-starter, if your concepts can gracefully inter-op with other tooling developers already use.