[dudefeliciano]

I work mostly with React but maintained a cross-framework web component library for a while, most of the issues that came in from our users we could not do anything about, as they had to be fixed by framework maintainers...the project died.

[DangitBobby]

Turns out that it's really difficult to make web components work with existing frameworks because instead of simply using existing web primitives as you'd expect, they made new ones. They use incapsulation primitives and state boundaries that make integrating them seamlessly with other frameworks anywhere from difficult to literally impossible. So it's unfortunate but unsurprising that the frameworks didn't fix the issues in time. Framework authors have spoken at length about their difficulties in developing generic interop with web components. Many of those issues persist to this day, long, long after the enthusiasm and momentum has gone.