Same problem here. I run a larger board with 3 vital addons (map, classifieds and tutorials). None of this addons has been updated to 4.x so far. It is really a pain, the 3rd party development is so poor in IPB. I can't code myself, but I really would love to pay much (50, 100 or even 200 bucks) for a good addons, which is updated frequently.
Now, while 3.x is not updated anymore and 4.x is no alternative for me, I probably will migrate to vBulletin in 2016. This is really sad, as I use IPB for many, many years now. But in my eyes IPB's fanbase is getting smaller and smaller. Too bad, really. :-(