First off, the moderators and testers here aren't paid; we're just volunteers and mostly users ourselves trying to provide feedback to improve the products.
As for products getting upgraded and support for older ones diminishing, that happens quite frequently in a lot of other sectors as well (your computer hardware and OS, for example). Also, since you have a first-generation product, with inherent hardware limitations, it will be more likely that a successor product will materialize, sooner rather than later, to address the shortcomings of the initial design. The fact that the newer patchers don't work on your mk1 is probably due to the entirely different (and improved) way that saves are designed to function on the mk2/mk3 hardware.
Now, for your question...
I have a neomax (magic key 3) unit, but for magic key 1, you are limited to using gst-patcher 3.1 (where the rom support is more limited relative to the latest patcher).
So a new rom such as #292 wouldn't necessarily work at all....
While your magic key 1 may have limited functionality, having a 1024 Mb Neoflash cart (which is still very expensive to buy) will definitely be useful, as it works well with the latest mk2/mk3/ & mk3 2006, if you should ever decide to upgrade. Or you can switch to another competing product line entirely, although I believe there are certain limitations inherent in each.
BruceG