I'm gonna go out on a limb here and say that we don't need any new gTLDs. I've previously discussed TLDs[1] and am collecting ongoing stats[2] on the domain count as best as I can, which lets me provide an at least superficial overview of their current use, so if you'd indulge me for a moment...
[1] https://www.netmeister.org/blog/tlds.html
[2] https://www.netmeister.org/tldstats/