How to keep vintage game consoles alive

In November of 2017 The 8-Bit Guy on YouTube created a video featuring new (2016 or 2017) games for vintage consoles, such as the Nintendo Entertainment System and Sega Genesis. Although he isn't a big fan of beat-em-ups he tried to give an objective view. He concluded that buying new games will keep these consoles alive. Although I agree one should support new games if one is fan of vintage consoles I don't agree that these new games are the (only) way to keep them alive. In my opinion only the love of folks who owned and used them back in the day already will do just that. That said, some things can kept alive without spending a dime. If you still own a working machine and (old) games, play them, to bring back memories from decades ago. If you don't own one, there are emulators and fan pages in the internet dedicated to a certain machine. Lot of documentation, tips, questions and answers, as well as discussion forums. One might as well find some game code dumps to use with these consoles.