>>96479099 (OP)
I mean I'm just into the hobby and lore and in that area its not that difficult to just consider all the 8th edition stuff not canon.
A tonne of my space marines are "Primaris" because actually the nearest forge world only has the blueprint for a variant of the Mk4 helmet, which looks like a Primaris helmet. The differences between the body armour are not drastic enough to bother me. Even my captain in Gravis armour is actually just in rare artificer armour. I avoid any hover tanks or the goofy primaris units. A Redemptor can just be a variant of a normal dreadnought. Assault intercessors are just tactical marines with a close combat loadout. Jump Pack intercessors are just assault marines. I bought a predator tank instead of one of the standard floating ones(bit small but not enough to bother me) along with using the Spartan from the age of darkness box. And so on
Mixing in HH marines also obviously works. I have a tonne of Mark 6 marines and a contemptor and stuff because the chapter is a second founding Raven Guard successor(kind of).
Even if I was to play the game I could generally contrive passable explanations for whatever stuff I don't like the opponent is running. They're running a bunch of primaris goofiness I don't care for, well they're renegade tech heretics my loyalist guys are fighting.
Then if you're collecting almost anything but marines your range is fine and does not necessarily reflect 8th edition lore. Even armies that completely came out since 8th edition are generally totally compatible with the older lore. Death Guard, World Eaters, Genestealer cults, Emperors Children, the chaos space marine refresh, Mechanicum, they're stupid expensive but the actual models are perfectly in line with pre 8th edition lore.