I like repeating myself so I say it frequently.
"If it smells like it, tastes like it, it must be it" - as they say around here when stepping carefully through cow pastures....
The R3000 and Pro 3880 share ink delivery technology in regards to the print head and the ink exchanger. There are actually other components that are the same. The firmware is not. But that's just the shiny paint job... Under the hood is the same printer - and we actually feature the R3000 and Pro 3800 using the same equipment in our two different maintenance videos. One you lift the hood and put it up on the lift - you see it.
Firmwares are interesting. One of the difference between the X800 and X880 is a difference in the amount of resting time in the cleaning cycle and the amount of suction time. The new VM would foam in the X800 - so this is one of the changes they had to make in the X880. It's in an Epson white paper on the X880 - in quite detail.
So the tools that you have to interact with your printer are sometimes critical in their operation.
The new LF printers announced are going to give you even more control over how much expensive ink the printer flushes into its box by allowing you to make it purge frequently... That's the upgrade rather than using the second generation TF head they put in the more expensive ($100,000) label printers.
So the new printers even if almost exactly the same as the X900s will seem different and should clog less. They will be harder to get 3rd party ink into. There is something up Epson sleeve on the P800 and new LF. It will take some time for the consumer choice prevention scheme to be unbound.
The most reliable and trouble free printers were the X000 and X600 platforms. Those suckers you can pull out of a landfill and get them up and running in less than 3 minutes. (i exaggerate) They are the Glocks of the print world (I am not exaggerating.) You really did not have to do much to maintain them....