I've been using Flickr to store my photos and videos since around 2012.  However recently I've taken the Google One subscription and so have 2Tb storage in there.  Bit pointless to be paying twice, so I figured I might as make the effort and migrate the photos and videos.

Flickr is really a photographers presentation site, for good or aspiring photographers to present their work to the world - it always was - not really what I was using it for; which was to keep my home photos and videos there - largely without displaying any of them publically.

Flickr doesn't have the same capabilities that Google Photos does now in  terms of photo "touch-up" like "remove this person", or the face-recognition, OCR text finding tech etc.  

Google Photos is just a lot quicker to access too.  Maybe Flickr servers are all in the States, or maybe they don't have connectivity to the internet as good, but when I scroll through previous years Flickrs thumbnails take ages to appear, whereas Google Photos is more or less instantaneous.

So ta-ta!  So long and thanks for all the fish.

There are already a multitude of ways to migrate from Flickr to Google Photos, but as far as I can see, either they aren't free or won't work 100% on larger datasets (will not be able to handle Google Photo's 10,000 a day upload limit for example).

https://support.google.com/photos/thread/293962/how-can-i-copy-my-65-000-flickr-photos-to-google-photos-in-a-batch-operation