You don't say how "old" your machine is. In the past 10 years not much has changed, as much as the mfgr's would like you to think. It would be great if you still have the old dies, which are not available anymore.
I think Sizzix is still one of the top machines today. I have a Vagabond (electric Sizzix) and a Cuttlebug. I don't think there is much difference among the brands, they all take the same dies.
Sizzix has gone wide now, so that's about the only change I've seen. I think others are waiting to see sales figures before making changes in their product lines.
Welcome back Marki.
I am pretty sure I know this I fell in love with those thin dies :):) I love my big shot but before I got it there was a way you could use it on my original Sizzix like yours I called her big red I will go find this