Honestly,

I have not used .png and .heic because of the large amount of MegaBytes they hold.

what is your experience with many large size images in long threads?

We do have several really long threads containing loads of images such as this

https://www.britbike.com/forums/ubbthreads.php/topics/983723/1
first page contains 50 images and there are 110 similar pages in this thread only.

This is why i am hesitant to allow other formats than .png .jpg and .jpeg but out members are not happy cause their phones and other gears use .heic and .png.

Do you have any recommendations what to do???

Morgan Johansson
BritBike Forum
https://www.britbike.com/forums/ubbthreads.php