I get the impression making a web app was considerably more difficult for a solo developer pre-jQuery. For a while we had an explosion of choices, and ultimately things coalesced around React and similar paradigms. Meanwhile the per-capita productivity has been skyrocketing as increasingly sophisticated cloud services provide everything from raw key-value storage to turnkey caching and auth solutions. Is it more comp…
Corporate was very slow to roll out new versions. So we could get to be years behind. Things like custom Active-x apps required specific versions.