I've always been someone who prioritises getting the best out of what they have got, and I agree the limiting factor, especially with playing a musical instrument, is personal skill. Unlike many areas, you can't buy success at playing an instrument*.
But part of this is, after time pushing the boundaries of what you have, better understanding what can help you take the next step. As an example, I bought a huge TE combo because that guaranteed a sound I have always wanted - bonus is that it was silly cheap.
That doesn't mean you might not get something just because its fun to use or nice to have.
*Many years ago the partner of a sister in law had a Trace rig and Jaydee custom bass, I never heard him play it once although he did once let me have a go.