I am new at this also and I thought and researched a CISS system (for another printer that died just before I made the decision) and found, like you, that they were wonderful while they worked. My research also found them to be finicky. I know, not helpful. My research also found that switching...
Welcome to the Pit of Despair :frow
New camera, gotta figure out how to process the images, then to print them, then to display them... Guess you won't be wandering the streets for a while.
Not to worry, it's all good. Well, most of it. Some, maybe.
Page 108 in the manual: https://files.support.epson.com/docid/cpd4/cpd42858.pdf#page108
You may, probably, have to set up the paper size on the printer.
Don't know, but this may help: https://cdn.kyostatics.net/dlc/eu/documentation/faq/faq_linux_speed_docx.-downloadcenteritem-Single-File.downloadcenteritem.tmp/FAQ_Linux_speed.pdf
Having worked for an embedded OS/software company I can tell you that support ain't cheap and they do, for many users, end of life products. And for those users who insist on "dead" product support that "pretty penny" they pay is far from a penny.
You may be able to rent a colormunki and profile just what you use. If you're going to play around with lots of different stuff a purchase may make sense.
I'm using a WF3620 with Precision Colors PCDB durabrite ink and am quite satisfied with it after profiling for the papers I use. Matte paper is excellent and I wouldn't be ashamed with using it on glossy paper - I'm sure that there are better combinations, but "good enough is the enemy of better."
I've never been offered a "special" pen when signing significant documents. But I guess here in the US a week is as good as a century... Here is a blog post I ran across about someone trying to get a useful answer from BIC...
IMHO, the difference between a professional camera vs a phone camera in terms of pixel count and density, for the most part, is no longer an issue. The reason cell phone images are of lower quality has todo with other things. A cell phone can, when properly used, capture stunning images. (Just...
As rs said, "it depends..."
You are trying, it seems, to equate sensor (pixel) counts to printed dots. They're not equivalent. If, for example, your sensor is 4 pixels by 4 pixels AND you want to print a 12 inch x 12 inch copy of that sensor capture AND your printer prints 300 dots per inch...
Here's a calculator - one of many that I found with googling "print size calculator"
http://www.scantips.com/calc.html
But the short answer is that most modern printing applications handle that magically. Lightroom, Photoshop, QImage, etc.