Epic level gaming sucks.
(Trolling...

sorry PC !)
Seriously, a few weeks back we retired a level 57 solo game. We started at 13.
At first, this campaign was little more than an exercise to see how
epic gaming would work. As we gamed on though, we discovered aspects of role-playing that we didn't experience at lower levels. I'm not talking game mechanics here, I'm talking about the scope of the epic universe, and the political-social ramifications.
IOW, we had a blast.
The game mechanics alone were fun enough to toy with (nothing creates moments of gaming like having a player roll about 400 dmg on a crit, and then having the critter say "that's it ?"). But the larger-than-life aspect was fun. It is true that it was more akin to being a super-hero than anything legendary (it was a SOLO game after all), but it was still quite entertaining.
After the campaign was over, I asked my player what level of gaming he prefered now, and he said "Oh, epic, most definitely". Of course, that's not everybody's bag, and I can understand GM's being intimidated by the number-crunching aspect. The key then, is to limit the high-magic aspect to invade your epic game as much as you're ready to tackle. No more.
In my example, it was a (mostly) single classed fighter, so the "spell" aspect was little used, which made it easy on me. OTOH, even if there was a full-fledged arcanist in the party, the DM could just demand that some spells and effects not be used for a given epic campaign.
"Listen guys, I know you want to play Epic, but I'm not sure I can tackle it, so lets compromise"
I'm sure players would be grateful of a DM being ready to contemplate something than just saying "No, sorry, not IMC".
YMMV, HTH