I grew up in a megachurch but I wouldn’t call it a “megachurch”. It (Manchester UMC) is large at about 2500 members but still does the services in the same format as it has been doing since as early as I can remember. However, I have been to a couple of “megachurches” with that style of service and can comment on the appeal.

Services at a megachurch have almost a laid back rock concert type atmosphere. There is a lot of contemporary music played and everything else is made to be as “soulful” and engaging as possible. It’s a very unique atmosphere, but the appeal is much the same as something like a country music concert. The services are a whole production.

The other advantage big churches have (and I did see this with my church growing up) is that larger communities make a lot of things easier. It’s easier to form service missions, bible groups, youth activities, etc, because it’s much easier to reach a critical mass when you have such a large congregation to pull from.

https://manchesterumc.org/ https://en.m.wikipedia.org/wiki/Manchester_United_Methodist_...