Of course, we all have our take on the subject! Most of your points have been stated over and over on the internet so clearly you're not the only one who has found that tube amps are expensive, heavy and unreliable (AKA "more maintenance") while lacking versatility. Give that you're 74 we know you didn't just fall off the turnip truck, and speak from experience! But while we're looking at the Katana that's a newer player and remarkable for being extra cheap, extra versatile, extra light, and generally super popular: I would just add that much of the tube amp rep has come from old time tube amps that are big, heavy expensive and old, while in many cases really only having one sound of their own. Seems to me that in the tube amp arena there is a new generation of small light weight less expensive more versatile amps on the market, many of which are now even more affordable used. And some are even better quality as opposed to disposable consumer grade. The Orange Tiny Terror/ Dark Terror/ Dual Terror amps are worth looking at, and have proven pretty reliable for affordable tube amps. Then there is a huge small builder market where we find hand wired vintage inspired often small light weight tube amps with exceptional tone, life time build quality, and in many cases even affordable pricing. Many are also versatile, being able to adjust between BF Fender clean and Tweed/ Marshall dirt. Then there's the third new tube amp market of hobby builders who make clones of Tweed Deluxe and 18w Marshall etc etc, then sell them to build more amps. Those may be built by hobbyists, but they are generally classic life time quality design and construction. I have small light weight versatile enough hand wired tube amps I paid in the range of $300 each for, one small builder, on tech built from a Weber kit, and one hobbyist built. Back to the idea that SS in general is "low maintenance" AKA more reliable, I've had IIRC six SS amps, from Peavey Bandit, two from Polytone, one of the cult status Yamaha combos, and a few I've forgotten. IIRC allof them eventually broke, and while anything can be repaired, most of them had a value lower than the repair cost, or so close that it made more sense to buy a cleaner used one than to pay to fix a beat up SS amp. We don't yet know how long the cheap Katana will work before needing service or disposal, but it is a fact that SS amps also need service! I don't know where the sort of myth came from about tube amps being less reliable or needing more service, but every SS amp I've had, generally had a shorter service interval than my tube amps! Meaning I bought a new SS amp and used it along with my used tube amps, finding that an old tube amp ran in some cases for 30 years without service, while NO SS amps ran that long before breaking. I did have an old Acoustic 150 head that might have made 30 years, but I didn't have it that long, just knew it was maybe 15 years old when I bought it and it appeared to not have any former repairs AKA untouched solder joints. The whole tubes vs SS is much confused by the fact that now so many really cheap tube amps dominate the market, and many of those are just as disposable as what I've found classic SS amps to be. Plus cheap tube amps are not "great tube tone". I think assuming the cheap Katana line will be as reliable as the expensive Roland Cube line is a looong stretch! Remains to be seen!