I think I've come to the point where if I'm not using software/app on a regular then I just won't have it on my PC/Phone. I use Duet Display when I'm traveling and need another screen next to my laptop so I'll keep it there but on my home and work PCs I don't need it on a regular.
I guess some background, I'm an investment advisor, where I manage retirement portfolios for clients, and sometimes having more screens helps me visually compare stats/performance from 1 investment to another (keeping it simple). Dual screens has been fine for normal days, but at times I wish I had 4 or 5 screens for those large workload days. (yes some people like me do need more than 2 screens and not just for ePeen lol)