[Achshar]

I don't have a ton of experience leading team's using react, angular etc but I assume you are referring to the fact that there are multiple ways of doing things in vanilla js world whereas only one way in react world. That can make things easier for teams but I believe that's a lazy excuse. Choice is never a bad thing and it's literally the job of a tech lead to establish conventions, tell devs what flow to follow. If that turns out to be too difficult then it's not the code or framework's fault. Staying strict about how to do things is a concept that exists irrespective of framework or no framework.

[rbosinger]

Have strict team conventions and being afforded the time to try an enforce them is great. Agreed. It doesn't always end up working like that in my experience though. Frameworks often have a community that provides some convention guidance. Rails, for example, is huge on this. You can tell a developer "stick to the general Rails way of doing this" and they will often be able to follow that instruction. Is that lazy? Sure, probably. But I also consider it to be a feature of a framework.