For the OP…I’ve found a few disadvantages of the hammock:
1. Without the extra weight/bulk of an under-quilt, cooler temperatures can be quite uncomfortable. With the under-quilt, you start to lose the advantage of weight and bulk compared to a tent.
2. Set up can be a challenge, especially when parks prevent you from using trees. However, with a little imagination, most hammocks can be set up just like a tent with no trees but using hiking poles or improvising with branches/sticks.
3. No different than a tent, but more susceptible, threats from window makers or falling branches can be a big concern…selecting a good site is still just as important as a tent in some ways.
4. Sex is really difficult and not the most comfortable…just saying
The beauty of a good hammock and having a separate fly is that it gives you more options. When the temperature drops you can just use the fly and set up on the ground with an insulation pad or natural insulation. If the ground is wet or swampy, a couple of trees can really make the difference between a good night’s sleep and absolute misery.
I won’t call it a disadvantage, but another major consideration that was mentioned was having protected storage for your gear. I would still debate that with the smaller solo-type tents, but with a larger fly, you can create your own vestibule for gear storage and I often use cordage or branches tied between two trees to get my gear off the ground (especially when went).
For the solo backpacker, a quality hammock with separate fly gives you so many more options. Even in colder temperatures, you can go to ground…in warmer temperatures or where the ground is swampy, wet, uneven or inhospitable, the hammock set up is much preferred.
ROCK6