I love Unity's new plan for allowing subscription based licensing. At $75/month it's a $900 per year spend. Not a bad deal, but after 2 years or so, it starts to look worse.
What I'd like to see Unity do is continue to offer the $75/month model with 1 year commitment, but to add a 2 year commitment plan as well. After the 2 year spend, a user will have spent $1,800 on their license., but the license would become a perpetual license. This is at a cost to the user of an extra $300 (20% over the "sticker price"). Unity would collect a 20% premium over the sticker price, and more developers would buy in (because the barrier to entry is lower).
In the end, I think this is a win-win. If people have a short-term project, and they don't want to go all-in, then the 1 year commitment is still an option. They get to use the product for one year at a $600 discount...that's awesome for those users as well.