Agree. One way to workaround this and raise LR4’s Z range for thicker stock, without overly compromising rigidity, is to mount the Y rail/beltholders on stable removable/clamped slats that raise the overall machine relative to the spoilboard surface. Use MDF or something else stable. Seen a few people use this as a easy/cheap/smart temporary alternative to a typical drop table.
I’m obviously biased towards LR4 , but still curious to see what scenarios MPCNC TNG is a better fit for…