I just saw that the ARRL Logbook of the World (LOTW) now contains records of over 1 Billion QSOs. That is impressive. When it started, I wondered if it would survive. It went through a period of slow-response, although I am not aware of any actual lost QSO records. Now it is mainstream.
If you like to keep track of your QSOs, you gotta be on LOTW. Let’s face it, everybody is using it.