I work with frontends among other things so I am semi-aware of the current state of insanity.
I try to not talk too much and go with the flow. The older I get the more software (and business) in general seems like it’s built out of raw insanity.
Back then, I believed that the people making this argument were onto something, as it felt overly complicated to me as a beginner.
At this point it feels more likely that the people making this argument don't have any kind of experience in frontend development that span multiple teams collaborating on the same UI.
In the backend this was "solved" through mocroservices. In the frontend you're gonna be in a world of pain unless you're using one of the popular spa frameworks. Well, you're probably still gonna be in pain. It'd just be worse if you didn't use the framework.
I started working post Ajax using jQuery using Java JSP’s (2010).