What's in a name? One person's definition of a hybrid may not agree with another person's.
My wife's old Dunelt 3-speed was all steel and weighed 28 lbs. The original Wright's "mattress" seat was uncomfortable, and most of the chrome was ugly. I installed an alloy touring bar with a longer stem, ergo grips, and straight alloy brake levers. The wheels are now alloy with Nexus 3-speed IGH and 1-5/8" knobby-tread tires. The bike weighs several pounds less and will shed more weight when I change the cottered steel crank to cotterless alloy. The most expensive upgrade was a Brooks saddle, but there are cheaper options.
By some standards, this bike isn't a hybrid, but it's much more comfortable to ride now, on or off the road (it can handle most gravel paths and rail-trails).