keybase's kbfs is my dropbox-style replacement. It works really well in my experience

kbfs is a network filesystem, whereas Dropbox provides file synchronization. kbfs does not work when you are offline, whereas with Dropbox the files are always available locally on your machine.

You can use uBlock Origin in Firefox on Android, and I've found DNS66 to be a good non-rooted adblocker on Android.

Now there's also Blokada which is a little bit better (found it to block some ads that DNS66 actually let through; it was a random discovery, I am not a researcher).

Check out newpipe, it's in f-droid. It supports audio-only with the screen off, and downloading audio from videos.

Check out keybase, I've been using it as a Dropbox replacement, and it works pretty well. Its file access on mobile is still in development, as is everything else.

"Runners who improved their performance in Vaporflys and then switched to other shoes got slower.

There were very few runners in our data who met this criterion: We counted just 24 such races. But these runners finished about 7 percent slower on average than they did while wearing the Vaporflys. (Of the 24 races, 17 races were slower, and 7 were faster.)"

But it's not the same device, in removing your old operating system you've removed the device keys keybase uses for encryption.

50 minivans!

That happens to a lot of college graduates I know. They stopped for me around a year or so after graduating.

$OLDPWD also holds the previous directory.

Machinery's Handbook and some GD&T reference books.