Firmware is a specific class of computer software that provides the control for a device e.g. a printer.
This is an imaginary example but think of it like your washing machine which also has computer software (firmware) embedded in it. This controls all the different wash programmes and spin cycles you can chose from. If the manufacturers decided to offer an additional function, say an even cooler economy wash cycle or a faster spin speed to save on tumble dryer running costs, it would need a firmware update. In practice that doesn’t happen as our washing machines aren’t capable of being hooked up to our computers and wifi systems to be able to do so, but I hope this helps to understand what firmware does.
In other words, keeping firmware up to date can be a good idea to take advantage of new functions but isn’t always essential or compulsory. Indeed in some cases, it’s best not to. For example, I know there was an issue with one Epson firmware update which prevented people from using compatible cartridges, for example, if they were buying less expensive non-Epson brands. There was a workaround for this by making sure that automatic firmware updates were switched off and the one which prevented the use of generic brands was not installed.
From the Epson website, I see there HAS been a redesigned of cartridges which affects T080 Hummingbird and others. It says this:
For a limited range of consumer inks, the Epson ‘Low Ink’ communication in the printer status monitor has changed. For impacted ink cartridges, you will no longer receive ink low warnings. Additionally, when the ink cartridge needs replacing, the following message will be displayed: “Ink cartridge cannot be recognised”. At this point the cartridge should be replaced in the normal way.
You may experience different ink level messaging from each of the Epson ink cartridges in the printer at any one time, depending on the cartridge production date.
The graphic display in the status monitor will still enable remaining ink levels to be checked and monitored until the cartridge needs replacing and you will still be able to enjoy the high quality, high reliability of Epson genuine ink, which is not impacted by this change.
www.epson.co.uk/ils
Long story short, I too have doubts about the origins of that email. From what I see on Epson's own website, I don’t think you need to do anything other than be aware that unless you check your status monitor regularly you may run out of ink without having seen a low ink warning.
I agree with volver to wait and seek advice next time you run out of ink.
If you decide you would like a new printer, the Epson EcoTank models are very economical to run. Initial outlay is more expensive but the ink, which you tip from bottles into tanks hence the name, lasts for a very long time. I don’t print photos with mine but most reviews I have seen which compare photos printed on an Epson EcoTank printer with third party services are favourable.