When I got the 2016 Touch Bar 15″ MacBook Pro, it was only about a month after I’d done an involuntary nuke and pave on my 2013 MacBook Pro. For those unfamiliar with the term nuke and pave, that’s when you erase everything, including the operating system, and then install everything from scratch. You can drag your documents over from a backup or another Mac, but you don’t bring over network settings or license files or any customizations you’ve made.
I have lauded the benefits of a nuke and pave over the years on the podcast and I’m a huge believer in doing it around once a year. It’s painful and time consuming (think days before everything is back to “just so”) but the advantages of speed and freed up disk space are enormous. Your Mac will feel like it did when it was new.