What do you think of a simple $X dollar per month subscription for an app like Adobe Photoshop ($50 a month)? The same product is also available perpetually fo

What do you think of a simple $X dollar per month subscription for an app like Adobe Photoshop ($50 a month)? The same product is also available perpetually for a one time fee of $2500 (no upgrades), equivalent to 4 years of subscription.