Since you're here, may I voice a thing I really enjoyed about Flickr? Community and actual human communication.
Perhaps in the mobile era this isn't possible anymore since everyone is attention starved and tiny screens and keyboards aren't conducive to longform communication, but this was Flickr's strength.
You'd find a group where your photos were relevant and start conversations with strangers halfway around the world. The ability for groups to self-moderate is key because it kept groups on topic. I just poked around some communities I used to frequent like Hardcore Street Photography [0] and Guess Where SF [1], and they're surprisingly still habited.
Instead of trying to be another Instagram, I hope the future of Flickr will play to its strengths.