I'd like to share my experience as a consultant selling support services to SMEs.
When I started, nearly 20 years ago (I was much younger), I used a different product at each new customer.
I choose the product that, feature-wise, was more close the requests of the customer, then I configured it and sometimes even slightly modified it.
But I also used different products as an opportunity to learn something new, comparing pros and cons of each solution, making the same thing in different ways, etc.
Then, when I had more than a handful of customers, I found that it was impossible to know all those products very well and I could offer a better service focusing on knowing perfectly a single product or two.
So I selected what I liked most and started using only it, sometimes adding missing features, or improving weak spots.
I still work on consolidation of many services on a low number of systems, SMEs can't afford to maintain a lot of server and I do a better job when I have to deal with fewer systems.
That said, my customers needs are probably different from those of other's, and I focus on mine.
But this discussion is really important and interesting. Maybe it's a different topic, though.