Honestly...running reasonably sized tires (41.5/42.5) I haven't glued sidewalls in ages. I found that when I glued sidewalls they would chunk really badly and it was even more maintenance. This is with many types of foam (synthetic, natural, weird new compounds) and both fronts and rears...

Probably the only thing I have had to glue recently are some of the Ultis come poorly glued from the factory, enough that you can lift the foam off of the rim, typically on the inside rear.