Yesterday I went down to Epson UK and had the chance to try out a P20000 64" printer
I'll be writing up a short review in a while - obviously not quite as long as my usual ones...
It is really is rather big - that is 64" width roll paper coming out of the printer (Epson TPP aka exFib in the US) Printing speed is well up on the P7000 I tested last year, but I've not got timings, since I was driving the printer via an old MacBook and USB
[full specs
https://www.epson.co.uk/products/printers/large-format-printers/surecolor-sc-p20000 ]
Secondly - the print coming out is 64" square (see the square image on my 15" MacBook Pro behind) and sheets of paper that size need a lot of care in handling.
It really needs two people and a big table.
The 10 ink Ultrachrome Pro set has MK and PK (no switching to cheer up some naysayers ;-), two greys, and M/LM/C/LC/Y - so slightly less gamut than the P5000 I'm currently testing (with Orange/Green)
The printer driver (my Mac is running CS6) is just like I'm using for the P5000 including ABW - ABW on the TPP and assorted matt art papers looked very good
There are quite a few cleaning and 'dust avoidance' features in the design, such as the panel above the left side ink cart box (700ml carts only in europe - also 350 in some other regions) which comes off to enable access to the print carriage for cleaning, whilst at the other end you can clean the capping stations and wiper blades.
Being told that there is as much paper and ink as you want, is an interesting challenge when looking at what to print. There is also nothing like seeing your work at 60" x 40" (and larger) to appreciate that lots of megapixels really do help.
The P20000 is a machine for heavy duty use - not something that's ever going to fit in my house :-(