Personally, I cannot really agree. I have one specific folder that contains two subfolders - one with 1000+ files in a single folder, and another one with 3000+ files. Syncing this folder for the very first time on Google Pixel 8 (which came with Android 14) takes 5+ hours.
On the other hand, the same folder syncs in ~5 minutes on an old Galaxy Tab running Android 7.