My own story/thinking:
My first really decent refractor was a Pronto and I had a lot of fun with it. It introduced me to birdwatching and digiscoping, I took thousands of photos of birds with it.. (see photo below) When the ED-80 came along and scopes with excellent color correction came along, I started down that path.. The Pronto is a great little scope but the chromatic aberration messed up enough photos of birds that I wanted something better corrected for color.
The ED-80 was excellent optically but way big to replace the Pronto.. The ED-80 was replaced by a William Optics 80mm F/7 Megrez II FD and that has been a favorite scope, every once in a while I ponder the TV-85 but the William Optics is excellent optically and mechanically and I cannot justify the cost for the small increase in aperture..
The search for the perfect small refractor led me to the Astro-Tech 102ED and I knew I was close, it was the right size and a very competent scope but I enjoyed it so much, I wanted something more perfect.. Tom Trusock's review of the NP-101 convinced me that was what I wanted so about 5 years ago I picked up my NP-101 and it's been a perfect scope for me, out under the dark skies, it a perfect companion for a large scope and in the backyard, it's handy-dandy and an excellent performer at high magnifications..
But the hole left by the Pronto's leaving was never filled. I couldn't justify both the Pronto and the ED-80 so I sold the Pronto, Attilla Danko of Cleardarksky.com bought it. I bought a William Optics 66SD but the lack of the 2 inch focuser and there wasn't just enough aperture.. So, I actually gave that one away to someone who had serious health issues...
But recently I bought a Astro-Tech AT-72 ED and that seems to have filled Pronto's role, it's just so small and handy and has quite good optics, I splitting Eta Orionis with it, 1.7 arc-seconds, the Dawes limit is 1.61arc-seconds.. A TeleVue 76 could replace it and maybe the William Optics 80mm FD but it would cost some real money and I have history with these scopes..