After I got my G43, which I consider a Gen5, I sold my 19.3 and two 19.4s. Unfortunately, I've only bought one 19.5 as a replacement, so I am down a couple of Glocks. I really like the 19.5 and I don't plan on buying any other Gen3 or Gen4 pistols. However, I still carry my 26.3 a good bit. Eventually, I'll buy a 26.5, but there's no big hurry. If I had five 19.3 pistols, I'd probably trade one toward a 19.5 and try it out. Be warned that some Gen3/4 holsters won't fit Gen5 pistols.