

In DuckStation it's basically the only fast forward I use, unless I need to test something real quick that doesn't require careful control ingame - only then will I use the toggle.

It saw so much more use than the typical toggle precisely because it's easier to release a key than to press it again, as silly as that sounds.

I've been accustomed to it since years ago with ePSXe where I bound it to the spacebar. In most situations I only want to fast-forward for short bursts and having to reach for the F4 key to toggle the framelimiter is annoying (and yes, I know it can be remapped). They wouldn't even be much work to have both in the new Qt hotkeys menu. How did I even miss this thread - I'd also agree with having both a toggle for fast forward, and a hold-to-use method.
