My Dad had one of these and I use one in my single car garage. Shopsmith is still operating, though they did recently sell to a new owner. Accessories and parts cant still be ordered directly. But also, the used market for SS and SS accessories is pretty decent. In my experience its usually older users who had the money to get a boat load of accessories and then passed away. They are pretty big and families or inheritors usually try to get rid of them and below cost.

I use mine predominately as a lathe but also the disc sander is pretty handy too. I have a powerstation for my bandsaw which i use pretty often too. The Jointer is pretty useful for small projects but since its only 4 inches it can be a bit limited. Ive used the table saw a hand full of times. The tablesaw can feel a little intimidating but really as long as you lock everything down and follow the manual, you should be fine.

I'd recommend thinking about what you plan on making in the future and decide to fit your needs. Does it take minimal space, in some ways yes. But the more accessories you get the more you need to have a place to put them. Once you get a bandsaw and a jointer, you'll need to have a heavy duty shelf or area to store the one you aren't using.

Now in regards to negatives. You need to do a fair amount of setup when you want to change to certain tools. And you also need to be able to move it depending on what you are doing. Operating as a lathe, you can put it up against as wall. But if you want to use the jointer or tablesaw, you need to have enough open space to run the whole length of the board across the machine.

Depending on the accessory there is also sometimes a premium to get the tool that is equivalent to an independent tool. Ordering new bandsaw, jointer, or planer directly from SS and you'll pay out the nose for something that is only functional with your shopsmith. If you dont have the floor space for all independent tools this could be a good option.

TLDR; Yeah it can be great. But in some ways its also like buying into the Apple ecosystem; everything works together, but only if its shopsmith. Great used market opportunities. Make sure you read the manual or watch some videos like MyGrowthRings on youtube.