I don't care for changes as long Flickr is free. There have been a lot of changes in the past. 1.000 pictures is a lot. In his long life Henri Cartier-Bresson published only 750 pictures.
I think that 1,000 photos is quite a low limit.
Erik, so far there are 912 photos at your main Flickr account. And you have uploaded a total of 1,591 photos if we add those of your five secondary Flickr accounts.
I never uploaded any digital photo to my Flickr account. Only film photos, carefully sorted by albums, themselves sorted by folders. Most of them being B&W photos (uploaded a dozen of my scanned slides only), home developed and scanned. All of them are uploaded at 800x600, "saved for the web".jpg, always weighting just under 300KB. All of them are also stored on two personal harddrives, and I have the negatives, of course.
Amateur photographer aged 51. Seriously started with photography when I was 14. Taking photos on a regular basis, but not frantically. No digital but for some seldom professional use.
FWIW, so far I have 1,413 photos on Flickr already, taken since 1981 and up to now. 413 photos over the limit already, so my free Flickr account is virtually DOA. I am just back from a nice trip to Chicago and I am developing and scanning : about thirty-fourty new photos are about to get uploaded during the upcoming month.
I am not interested at getting a "pro" account and can very well live without Flickr. This won't change much for me - I never used it as a "community", my photos aren't public and the very short list of people I "follow" are people I know in the flesh - the same for those "following" me.
I would never use anything which would be Facebook related either, so, no Instagram.
Flickr used as a social network with public photos and albums and hundreds of "followers" and "followed" is the best way to be a worldwide famous anonymous. To each his own.