With all these new APIs, I worry what the web will look like in 10 years, will be have this huge API surface always will us? Will we start to see deprecations in the web api? I'm worried if the XSLT is setting a precedent on deprecating "complex" and "hard to maintain" APIs.

EDIT: Think also about webgl1/2, webgpu, webxr, websocket, webrtc, webauthn ...