I'm one of the old guard of coaster builders who got sick of waiting for this to be fixed/addressed. I've commissioned a mod to deal with this issue: All work is done by Tfarecnim https://www.curseforge.com/minecraft/mc-mods/cinematic-carts
The project will be updated soon to also support diagonal rails through a custom rail block that can be clicked with a stick to make true diagonals, thus allowing for smooth diagonal turning as well.
I'm one of the old guard of coaster builders who got sick of waiting for this to be fixed/addressed.
I've commissioned a mod to deal with this issue: All work is done by Tfarecnim
https://www.curseforge.com/minecraft/mc-mods/cinematic-carts
The project will be updated soon to also support diagonal rails through a custom rail block that can be clicked with a stick to make true diagonals, thus allowing for smooth diagonal turning as well.