That's right.
I haven't played around with SD adapters but there is a common problem with compact flash cards that gives the same symptom. They won't be bootable until you fire up DOS 6.22 and run FDISK /MBR, which is an undocumented command which gives no output but fixes the boot record. I would focus on getting the floppy drive working or buy a gotek so you can boot floppy images from USB and get into DOS that way.
Bomb squad movie where the bombs are wired to Jenga towers.
Shoutout to John Newcombe's live viewdata service, Telstar. Instructions on how to connect from various platforms are on his website. I often dial in with my BBC Micro to catch the latest news headlines.
I'm not interested in programming for it myself so the way I see it, its desirability very much depends on network effects and whether it gets a big enough user base and software library. I think there is a good chance of that happening but I keep seeing new projects muscling in on the same space like the Foenix computers and the Agon which makes it less likely that any one of them will be a thriving 'platform'.
I used one of those as my daily driver for a while. The ergonomics were murdering my hands. I would not want to have to use one as part of my job.
I'm not actually sure what the minimum requirements are for 3.1, except I know that 3.1 upgrades were sold for the A500/A2000 so it should work on a classic configuration. I know that the newer Hyperion updates to AmigaOS raise the requirements quite a lot, so I wouldn't try going to 3.1.4+ without an accelerator/fastram.
I'm not sure about compatibility lists but from what I understand, it's only a handful of early and badly behaved software that requires 1.3. It's probably better to just install 3.1 and use Relokick as needed to run incompatible software.
All I want is more non-flat themes.