No i'm not describing myself, others would though. However, every time i need to cut a piece out of some sheet metal i end up using tin snips. Today i cut over 3 feet so i can make a start on replacing my rotted floors. I actually find it somewhat relaxing... Am i the only idiot that does this or do other people do things the (very) old way?
...You done a standup job there...I'm a Wiss aviation snipper however I was very fortunate to snag a Beverly Shear in a Plant Closure and that is something it handles quite well...they are bang on period...yes tin snips are a more typical garage shear as all the others cost more and money's always tight...good exercise but be careful its glove territory...sharp I am surprised you could achieve it with just those...helluva design... A jig saw or band saw probably got involved here and there... Along with the Beverly I also got a 50s ARO Air Powered Panel Saw that also could do straight cuts as well but Aluminum was it's primary metal but with a different blade perhaps steel would be a breeze...the cuts fine with minimal distortion... To this day simple tools are used much more than one would imagine, so I think you have plenty of company...
Wiss aviation snips is my go too, but I broke down a bought a cheap HF nibbler that make fast work of the job. HRP
Got a drawer full of wiss tin snips left , right , straight , some with weird heads in not sure there intended purpose but they get used as well. I bought a air nibbled years ago I use for long runs like what you just did. like what @Stogy said , jig saw , band saw , nibbler, angle grinder , etc what ever gets the job done faster n easier I’m on board. but yes, simple tools bring a smile to my face and they always seem ready to work. The odd time when I grab my air nibbler or shears as they don’t get used very often I gotta tap and bang them to get going, guess the oil gums up after a while .
I have a nibbler too, just can’t stand to use it, those damn itty-bitty crescent moon shaped chips get everywhere and boy do they hurt when you find them on a midnight bathroom run!