The Trail Manor and fiberglass "egg" trailers are very specialized products that have limitations, as all RVs do. With the Trail Manor, you get a larger, more traditional trailer-like interior but with limitations due to the design. I wouldn't be happy with the smaller refrigerator and less overall storage, but that is due to the type of traveling/camping that we do which includes multiple week trips. The design of the Trail Manor can make it more efficient to tow i.e. higher gas mileage and smaller tow vehicle. The same can be said for the fiberglass eggs. I've looked at the "eggs" online, and feel that they are a viable option if you really want to have a smaller trailer. Right now, I'd rather keep our 26' Winnebago, but if the time comes when I want a smaller unit that can be towed by a smaller truck or tow vehicle, the fiberglass eggs are really nice and should be very durable but that comes at a price. I don't think the DW and I would be happy traveling in one for multiple week trips, but for shorter trips, we could adjust.
It all boils down to what meets your needs. When we had kids, we had a pop-up trailer and really enjoyed it. When the kids were in college, we had a 29' trailer with 1 ton truck. A couple of years ago, we downsized to the Minnie and it works well for us. We're in our sixties...so who knows what the next rig will be!!