Are LAN sockets still up-to-date? WLAN/wireless is the future!

I would drill them. They are supposed to hang there for decades ...

Wanted to look for alternatives to drilling to avoid the reinforced concrete problem. Sure, there are suitable drill bits for that, but if possible, why not glue it. Then I would stick the smoke detectors to the ceiling following the same principle instead of drilling everywhere.
Upstairs then single-layer drywall. Although it is also possible with the appropriate anchors, I would prefer a simpler solution here as well.

Would then stick the smoke detectors to the ceiling following the same principle instead of drilling everywhere.

I would (and have in the past) always do it that way. As simple as possible.

Quite clearly drill. The APs from Unifi but also other manufacturers have a mounting plate. You attach this to the ceiling. APs can then simply be installed and removed.

From what all the adhesive pads etc. leave behind or what happens to Powerstrips after years, I consider drilling holes the simplest way to attach such things.

Now there are supporters for both solutions and I will probably choose the wrong one :) Then please give me a recommendation for a suitable [Stahlbetonbohrer]. I failed at a lamp this weekend because I didn’t find a suitable spot without iron.......