In the same vain, I paid $200 for Logic Pro X three years ago and it still does what I paid for. I’m about to spend $300 on Final Cut Pro.
If Logic Pro went subscription only at, say, Photoshop prices at $20/mo, that would be the equivalent of $720 so far. Even though Logic is seriously awesome, I would not pay it and just go with something else.
Edit: the $20/mo is the price only if you pay for a whole year. Otherwise it’s actually $31.50 per month. So you are either paying a lump sum of $240 (committing to a full year) or $31.50/month.