Personally, I feel like 4e+ has added "nothing" to the SR world/game and, also, has reduced a lot of interesting angles for gameplay. (Again, my own personal feeling). When I play SR, I play a Hybrid of 3rd with 2nd influences; while I have looked at 4e and 5e (and played a COUPLE of sessions of each of those editions) I feel like the changes are not "good enough" to warrant a full on edition switch, and, still stick with 3e+ . I have not investigated or played 6e based on the large amount of negative feedback, so, no real comment there. Since you're asking for thoughts frome an SR player/GM, there you have it.