I read some threads about how long a sequence can or should be. My question out of curiosity is: What is the largest sequence (+link) you encounter, or is even the largest sequence known. Happy to hear your experiences 
Sequences will always be cut into max 1000 images, you shouldn’t find any longer sequences.
Well, this is obviously not true (at least not anymore). This user (https://www.mapillary.com/app/user/osmplus_org) uploads much longer sequences here ;). I saw one above 15k…
I once had the option to set more than 1000, but those sequences have been on processing for months and only one image is visible.