ZX-TEAM meeting/TS1000 least expandable???

I've just returned from the annual ZX-TEAM meeting in Dietges, Germany, and I must say this 90-member international users group is doing some astounding things. I saw lots of ZX81s with full-sized LCD displays, AT keyboards, hard drives, floppy drives, scanners, modems, and 1 MB memory expansions. Some folks were using ZX81s to control RC devices (such as robots), and CNC machine tools. The TEAM now has a 24-hour dial-up BBS, running on a ZX81. Also demonstrated was a nifty C compiler which runs on Windows-based machines and which produces compiled ZX81 code. All in all it was pretty mind-boggling, and well worth the time and money I spent to attend the meeting. Last year on this list the ZX81/TS1000 was voted "least expandable". Now, I don't mean this to be flame-bait, but can someone please explain to me how the ZX81/TS1000 could, by any stretch of the imagination, win the prize in the "least expandable" category???? Glen 0/0