Regardless of whether the Adobe line of products is the (admittedly subjective) "Best" in any or many subareas, you have to give it to the company for developing an awesome business model.
They have an integrated product lineup that works seamlessly through the spectrum of photography to graphics to publishing. InDesign is rather inexpensive (IMHO...) but full featured. Illustrator dominates the field. LR/PS is the standard in its area as well. Most importantly, they integrate seamlessly, and use the same terminology and paradigms. After messing about (and "messing" may be taken literally in some cases) in PSE for years, I switched to LR a month ago, and heard the sound of angels and a sunbeam come down from heaven when I did. The learning curve seems easy, and the tools are quick and easy to apply as well as to reverse. If you know even a bit from past editions of PS or PSE, you'll find this a breeze to learn.
That's where the marketing genius comes in - they've developed a seamless system that has become the professional standard, along with easy-peasy products for the average user. And they've developed a whole new marketing model to sell it to the consumer and business markets (Ten bucks a month? That's three large Starbucks coffees, and a LOT more fun...). This seems to be the way the world is headed - see Netflix, Hulu, Amazon Prime, Office 365, etc.
AutoCAD is trying a very similar thing in the CAD market, with both entry level and high end CAD products, encompassing tiered pricing and products. I think they're doing just fine, and I have subscriptions for both professional and personal products.
There are, of course, disadvantages to the subscription model, and any dominant company can be brought down when a bigger financial fish throws money at the design and development programming and aggressively takes on a smaller firm that dominates a subsection of the market. Microsoft could, literally, bring down Adobe, AutoCAD, or any other software company that is dominant in its field - it has the financial resources and ability to undercut pricing models.
Like it or not, it's the world we live in today. I'm pretty happy with both the product and the pricing. If the price goes wild in the future, I'll look for purchase/download options, but in the meantime I'm enjoying the benefits.
As always, just my thoughts. I've learned that insisting one is right is often the best way to make sure that you're wrong....
Andy