I still have my Falcon FN19 skeleton walnut pistol grip rifle., although I've been thinking of selling it because of my new FX M4 .357. I had a Webley Tempest .22 pistol with walnut stocks that I sold because of my Huben GK1 .25 as that is just so much more fun, accurate, and powerful to shoot.
When I think of the best obsolete, I think of the one whom was one of the first great innovative PCP's with good power, accuracy, and that is the Benjamin Rogue .357 rifle. That to me was one of the first to show the power of PCP's yet Benjamin scraped it after a little over a year if that? and now all they make to me are low end air rifles. If they kept that rifle and got into the more mid to higher quality rifles they would be a one of the leaders but now they are in the low end segment....
That is the problem when brands do not innovate they will often suffer the same fate being obsolete.