But even if it grows linearly in transactions, that depends on transaction growth which might not be linear... and that's still independent of what's tolerable

But even if it grows linearly in transactions, that depends on transaction growth which might not be linear... and that's still independent of what's tolerable for a typical user. I was going to post something related, which was when I tried bitcoin for purchases, the whole thing involved way too much faff and was too slow for everyday use. Maybe for some purchases but not for everything I might do online. I guess if you had an account in bitcoin but then you're back to banks etc which might defeat the purpose slightly.