My impression is that Taldren, unlike other companies, have more of a sentimental attachment to their software, and Dave Farrell in particular, (correct me if I am wrong), is no doubt quite proud of the SFC series. Given time and resources, I think Taldren would love to continue to release patches for the SFC series until it was exactly how they dreamed it to be in the concept stage.
Very few software companies at all, release patches for a game that is well past its shelf life, if at all.
Some time ago, I found a copy of Activision's Call to Power 2 at a considerable discount. Being a Civilisation fan, I had played the first Call to Power as well and liked it, so I was looking forward to playing the next version in the series.
The game is badly bugged, and only one patch was ever released for it. Furthermore, the game really only added one major change that enhanced it over the previous version, at the sacrifice of removing many others. Wondering if the game was going to be fixed, I browsed some of the Apoliton forums where all things Civ are discussed and found several threads discussing the issues with CTP2. Included there was actually a reply from the CEO of Activision informing that Activision, who created CTP2 in house, no longer even possessed the original source code for CTP2 and the original programmers had all moved on. The game now sits collecting dust.
So, I think we're very lucky to have a company like Taldren who is looking after our favorite games, and whether or not time can be made in the future to continue that process in the SFC series, we really already have had so much more than could reasonably be expected. Work on the SFC series may be on the backburner for now, but at least its still there somewhere, and whilst community support for the SFC series remains strong (and I dont see this changing at all in the near future), I think Taldren's sentiment will remain. Thankyou Taldren.