There's quite a few clocks available that get their time over the air from the NIST WWVB radio station[0]. They usually have a little switch on the back if your area does/doesn't observe daylight savings.
Right, but more specifically they are most often used for scanning stuff like air-band and VHF/UHF two-way radio traffic. Nowadays with a lot of public safety being digital P25 (requiring more expensive scanners) and online streams being so easily available, there's not a lot of reasons to buy a scanner unless you're really passionate about it.
You'd be suprised, the shear amount of black box vendor nonsense out there borders on astronomical. Weird telco stuff, old cisco hardware, BMCs in servers, it would mean gutting probably millions of dollars of equiment. It's stupid, but throwing the baby out with the bathwater over openssh won't make anyone happy.
Google Play Services implements a lot of increasingly vital features and interfaces on Android. Not having it kills a good number of things people consider important, like push notifications (some apps are designed to still send push notifications like Signal, but it's kind of a hack and does drain the battery). If you're looking for almost the same functionality without google play services, MicroG[1] is an open source implementation of Google Play Services and its' associated components. I don't think it works on GrapheneOS unfortunately, but GrapheneOS already sandboxes all the Google Play Services components, so you should be fine as is. "Normal"/stock Android roms aren't set up the same way however, so you pretty much need either Google Play Services or MicroG for push notifications, location services, etc.