It is way too early to tell. If we are comparing to web browsers we are in the early 90s with Netscape, IE, Firefox, etc. I don't even think we are at the point

It is way too early to tell. If we are comparing to web browsers we are in the early 90s with Netscape, IE, Firefox, etc. I don't even think we are at the point where agent's have a metaphorical JavaScript, we are that early. The thing that makes everyone build against Chromium is because web browsers are very hard and it is well supported by dev tools like Electron and Playwright. Harnesses are so easy compared to a web browser, I'm curious what in this world you see that would make building your own harness seem crazy, because I don't see it.