I am speaking in a more general term, off course someone with 23 TB doesn't fall in the "general" category, not even to mention someone that can upload 5 TB of data in a month isn't the "average" user exactly(I can barely upolad 5 GB a day, running 24/24), being such an "extreme" case kinda makes you out of the picture by default: its like a professional talking into a rookie club, off course the professional may and will have different ways to do his things, but a professional / extreme's ways aren't exactly suitable by default for more average people.
But let me understand a point that's beyond my comprehension apparently: how exactly a link to an online folder its inconvenient?, how exactly sharing 50 links its more convenient than sharing a single one?,you mentioned download managers okay, but you also said that splitting files its convenient because of some people's dodgy internet connections, but aren't download manager made so even if you disconnect you can always resume an interrupted download anyway?, its kind of a contradiction there.
Also you know, you don't need a download manager to download multiple files from an online folder, no need to copy-paste multiple links,just select multiple files like you would do in a normal desktop environment, just saying.
Also I don't get how having 2 TB of data its "cute" in any way, not everyone downloads everything and in multiple version as well, I've been surfing the internet since late 1990, and If
I were to download everything I had a slight interest for(and assuming I had a proper internet connection and enough storage),
I would probably have double the amount of your data, at least.
But since I am more an average user with a limited interest in things, I am pretty selective when it comes to movies, TV shows, animes, games, and any kind of digital stuff, so I end up downloading and keeping only a selection of them, I assume your 23 TB of data are all very important to you?, I don't know about that, for me, even a 100 KB file its important, if I download a single JPG file, that's important, I am not the kind of user which download something just to view it a single time and then forget about it.
Also, wanna switch connections for a month?, I'll give you my 1 MB/s download speed and my blazing 100 Kb/s upload speed, and let's see who downloads / uploads the most
But then, how many users are out there with 1 TB of data?, and how many are there with 20 TB of data?, I can guess that for every "extreme" user with as much as 20+ TB of data there are at least 100 "average" users with around 1 TB of data, so even if you hold a lot of data its doesn't really have that much significance.
You said that 23 TB its 460 accounts, fine, that's how much exactly, 1,3 accounts per day for a year? about 3 minutes each day? the horror o_o
If you can upload 5 TB of data per month that's about 100 accounts, which is 3,3 accounts per day(assuming you upload every month 5 TB which its kinda hard to believe), which is about 7 minutes a day, eeh.
Also for importing files between accounts, I wouldn't be sure that a takedown would delete all its copies since I already tried importing a file from one account to another and deleting the original, and, the copied file was still alive and well, downloadable no problem.
Again this whole conversation its kind out of the picture, not everyone have 20+ TB of data and that crazy uploading potential, I think for an average user with a "mere" 1-2 TB of data having multiple free accounts its way more convenient.