Earlier quoted context omitted.
I almost agree; but in my experience, JetBrains IDEs are worth every cent. I am more productive on them than in Visual Studio Code, even for "simple" tasks, like raw HTML/CSS/JS editing.
Weird, I can't stand them. Mine falls over on a moderately sized project and it feels like it's always melting while re-indexing-- which also totally blocks inspection operations.
In my experience, the lazy autocomplete takes less resources at start but the result is that autocomplete suggestions are loaded in as files are being parsed. The larger projects grow, the slower this process is.
I suppose slower CPUs like the i3 series and low i5 series Intel chips will probably have a lot of trouble with the indexing. You need a laptop with a decent sustained core speed to do the work (which can be a major deal breaker in cheap Windows laptops and the lower tier Macbooks), but the few seconds wait you get on a professional machine when a project gets loaded in is well worth the wait to me.