I'd say it's not really as much a threshold as it is a damning realization. Usually you just keep developing, things get shipped, business as usual. Then eventually someone high up raises slowness as an issue, and that's when you realize that you've got a problem.
In a previous job, we were clocking at some 30k+ DOM elements worth of densely packed features on any given page before the company decided to put resources into fixing performance.
In a previous job, we were clocking at some 30k+ DOM elements worth of densely packed features on any given page before the company decided to put resources into fixing performance.