But the flipside is that $10/month is a lot easier to stomach for most of the general public than a one time cost of $300+.
It’s why there’s monthly payment plans for everything expensive. $40/month for a (24 month) lease-to-own phone is a lot easier to budget for than a one time $900+tax purchase. But when I go to BestBuy or wherever, I have the option to choose the payment plan or upfront. Not with software.
But yes, with subscriptions, it would be cheaper to buy it outright, but not everyone has that luxury. We can argue all day about whether people need Photoshop or whatever, but the best option (IMO) is to allow subscription and purchasing and let the user choose. Then those who can afford the $300+ up front can spend that while those with little disposable income can spend $10/month.
Take photoshop... I'm not a professional graphic artist, and I have need for PS maybe once a year at most. Depending on the importance of that need and my desire to own the software it might justify a onetime purchase. But with their subscription model it just isn't worth it.
One of the things I liked about the old model was it put professional tools into the hands of amateurs if they were willing to save up their money. Now, instead, you pay a yearly tax that is not insignificant for no real gain