I'm sorry you feel that way. I've written Firefox extensions as well. Also, I've written software using GTK2, Python 2.4, Django 0.9, a bazillion JS libraries that no longer exist. I've written code for games that have shut down. I've written code that I backed up on CD roms that are no longer readable. Hell I've written plenty of code that never even worked in the first place.

I don't feel like any of this time went "down the drain". Why do you? Software doesn't usually last forever.

All my time writing Internet Explorer extensions and HTA desktop apps in C++ and JavaScript and HTML with ActiveX went down the drain, but those skills got me a job writing xulrunner desktop apps in C++ and JavaScript and XUL with XP/COM. And then all that work went down the drain too!

Now I know how to write Electron apps, but before you know it, all that work is going to go down the drain, too! Get used to it. ;)

Change is good, and each iteration gets better, and if you're not enthusiastic about learning new stuff all the time, you're in the wrong industry. I do NOT want to go back to ActiveX or XP/COM, thank you.

Did you know that Mozilla actually invented words to describe the process of removing XP/COM: "DeCOMification" and "DeCOMtamination"?

https://news.ycombinator.com/item?id=12968830