I've had this happen a couple of times now. There's definitely some jobs where I looked around and realized I'd used just about every tool I have.

I think the only disappointment at the moment is my Makita rotary drywall cutter - a reciprocating multi tool is just so much easier to control and makes nice straight cuts easily.

Still waiting for the welder to have its moment though.

A welder, huh? Hm... don't have one yet... hm...

Those rotary drywall cutters are the ticket for cutting plastic. I first used one when I was a mechanic before changing careers, and we used one for trimming tough plastics like bumper covers. Takes a bit of practice to get a nice cut, since they are super aggressive, but they make a very nice, clean cut that's far better than any other tool I've tried. I've actually never used mine on drywall, I prefer one of the oscillating tools or a jab saw, but I've used it quite a bit for automotive and electronics work. You can make a front panel for a project stupidly quick with one of those, and it turns out nicer than cutting with a dremel cutoff blade.

I counter by asking if renting them would have saved you money. It's what I do when I need tools I don't usually use

It depends on the tool. Generally, lending tools is not cheap where I live, but I once did lend a concrete sander because it was still cheaper than buying it (four digits, and likely won't ever need it again).

But what if you bought S&P instead and only liquidated when you needed power tools? Opportunity cost is real!

Disclaimer: had to expand the shed to fit all tools