Here's a similar question: Migrating to new iMac, what does Migration Assistant actually migrate?
The reason I'm asking again now is because this question was asked TEN YEARS AND FIVE MONTHS ago, which was before back when Mac OS X 10.7 Lion was released! Since then, there have been 10 updates to macOS, so I'm pretty sure the information is quite outdated.
I'm using macOS Mojave 10.14.6, and I've made several changes to the operating system such as setting a Root User passcode, creating a hidden super-user account, overriding Gatekeeper to allow installation of all apps, executing countless commands in Terminal, manually deep-cleaning all traces of a bugged antivirus that would never fully uninstall, installing a boatload of Homebrew, and even keeping all remnants of the fabled Macromedia Flash Player. My Early-2015 Macbook Pro 13" with Retina display runs surprisingly fast, but it was a base model with weak hardware. I recently got myself a Mid-2019 Macbook Pro 15" with Touchbar and the best hardware (except the hard drive is 1TB instead of 4TB, but that's way better than the 256GB I've struggled with for the past 6 years– but it runs Mojave, so I'm happy keeping my 32-bit apps that are not longer supported).
I need to migrate everything, but I don't have time to be picky. Would Migration Assistant do everything I need? Should I install from a Time Machine backup? or is there another way that's not tedious but will be effective and not compromise the newer Macbook's performance?