I have tryed Forge Essentials a little and will have to say they have a long way to go before they can cover atleast the plugin World Edit and Voxelsniper so, not saying that forge wont be a good replacement for bukkit, but it seems like they have a long way to go before they get to where bukkit is today. And i have not had any problem with my plugins not being updated, or heard about anything ells that can give players the same things until now, so i would say you are just assuming when you say that "Bukkit is on it's way out of popularity". So until there are more info/tutorials and mods for Forge that can replace the once we use in bukkit now,(and explain how to use and replace). I would have prefered if Tekkit classic got atleast one more update before it got droped. But thats just my opinion.