Silhouette Cameo 3 - worth the upgrade?

I don't actually have a 3 but have done a lot of research on it, so I'll give you my thoughts but take it with a grain of salt since I do not own the 3. I own the original Cameo like you.

Differences
Now has dual carriage system (so you could put both a blade and pen in at the same time, without having to stop the machine to switch out the blade for a pen)

Uses the auto blade (you no longer have to take the blade out and manually adjust it)

Is quite a bit larger because of all the onboard storage

Has Bluetooth capability (so you don't have to connect to it via cable)

It has a 2mm clearance for thicker cutting materials and you can use the new deep cut blade

Okay, so now I'll tell you what I think about those features:
I think the dual carriage is a nice feature, but with how I use my Cameo, not worth it to me

Basically the way it changes the blade setting on the auto blade is to take the blade housing and click it against the machine really loudly. It's hard to describe but when I helped someone with their machine in person, to me it was very loud and annoying. I'd prefer just to change my blade the old fashioned way.

Personally I like my original Cameo better since it's smaller, the 3 was noticeably larger. The way I have mine set up the 3 wouldn't fit in the cubby where I have my current Cameo

I have heard that the Bluetooth does not work well. I don't know if that issue has been fixed but when it first came out pretty much everyone had a problem with it.

While the extra clearance and deep cut blade are positive, keep in mind that the cutting force is EXACTLY the same as previous models, so it will not magically be able to cut much thicker materials (for example, the Cricut has a much greater cutting force than the Cameo so can cut materials the Cameo can't...but that's a whole different discussion)

I'd recommend watching some reviews that Ken's Kreations has on Youtube.

With all this in mind, I would not choose to upgrade my Cameo yet. Hopefully when they eventually come out with the 4, it will have a greater cutting force which to me might make the upgrade worth it. Again, I don't actually own a 3 but this is what I've found out.

I love mine. The autoblade is such a nice feature, the noise doesn't bother me at all, and the machine cuts like butter. Since mine is on my main work table, I don't use the Bluetooth most of the time. After the first firmware updates it has worked fine the few times when I have, though.