I think it depends on your approach. It's always nice to have new stuff to play around with, and that invites creativity - which is great! However, there's a certain point where I think it's easy to get bogged down in the intricacies of getting everything to play nicely together or become overwhelmed with the burden of choice. I'm not saying that everything has to be justified in a practical manner (sometimes it's nice to buy/own something because you've wanted it for a long time), but I do think the old adage of "perfection is achieved not when there is nothing left to add, but when there is nothing left to take away" sometimes applies to gear acquisitions.
For me, I realised I'm an in-the-box guy a few years back and sold my little toy hardware setup because I simply wasn't using it any more. I absolutely don't regret it at all - I had plenty of use out of it, and it had simply run its course with me. Anything I purchase now either has to invite creativity in a separate space, or work seamlessly (or as close to as possible) with my existing ITB approach. It's why I love stuff like Elektron's Overbridge and, on paper at least, Access's TI integration (though I've since switched to a different solution for the Virus). You get the benefits of having a hardware box, and it integrates easily in software.
On a totally unrelated note: I do think there's a weirdly performative/show-offy aspect with regard to public figures showing off new synths and stuff, which I'm sure has become much more prevalent over the past decade or so. It always upsets me to see someone showing off a fancy-pants modular setup with the most uninspired early-00s-VST-sounding stuff rather than taking the time to plan and really squeeze the best out of what they've got. Every time I'm curious about a new synth I'll invariably check it out on YouTube, only to see a bunch of folks making a bigger deal over the fact that they've got access to a particular synth rather than doing anything particularly interesting or good with it. That said, there ARE plenty of videos out there of people doing cool stuff with new gear - I guess what I'm saying is that I'm a bit of a moany arsehole.