The primary endgame resource is "Chaos Shards". You get 4 Chaos Shards for every Tier 7 + 8 miner pair. Making miners is fast, but you also need "Dragon Lair Data" whose primary source is Simulation Chambers. I have every creative item except the infinity solar panels. Each of those requires 36 infinity ingots, which in turn require 36 hearts of the universe which in turn require a Tier 9 and Tier 10 miner pair and I've got to say the endgame feels like an eternal waiting room because of those stupid infinity solar panels.

Now adding insult to injury, I've recently started adding hundreds of Simulation Chambers to the game and the ticks per second dropped so bad it ended up being a net negative in terms of the Chaos Shards production rate measured in real world hours. Having an absurd time gate like "Dragon Lair Data" where you can do nothing but wait is bad gameplay.

There's also the mild annoyance that your storage system is overflowing with millions of items due to how long it takes to make all six infinity solar panels.

Why am I posting this? I'm saying that the Minecraft developers obviously didn't forsee people making factory mods that cause performance to tank hard. The game engine was never meant for this kind of workload unlike say the Satisfactory Engine.

[0] The Creative Tank lets you duplicate any liquid, which includes almost all ingot types, giving you infinite base resources.