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That's an interesting observation, but I offer another angle to look at it. For the record, my first transceiver was TS520V, and I'm also familiar with 6146. But BS170 is more fragile than 6146 or bipolar transistor finals from the 1980s.

I think this matter is more about engineering attitude. Many things are trade-offs that do not lead to one best solution. We also have different levels of comfort in applying knowledge and experience from somewhat related areas (not amateur HF radio transmitters) but have strong similarities in the nature of the design factors. We also have different cost-benefit trade-offs to act or not at any particular risk/concern/challenge/issue/problem.

I plan to build a QMX with a 60 to 10m filter bank for SOTA. When I go to SOTA activations, I already have 3 pages of checklist at home and more to worry about on the trail. I am not hiking with my soldering iron to the summit. In the worst case, the rig will be the emergency communication method, so my risk tolerance for this particular operating mode will be lower than a Heathkit rig. I would spend some time designing mods to minimize the risks of known/plausible failure modes to a practicable level and spend some extra dollars. I am happy to discuss my thinking process, but I am not selling the plan to be adopted universally.

Sometimes, there is nothing I can tie an antenna to at summits, but I need to make some contacts. Many SOTA operations I did were in very windy conditions. Occasionally, telescoping masts collapsed during transmission. Some telescoping stainless steel rod antennas (MFJ-1979 and the like) developed poor connection at the top junction, and the SWR changed with the wind (it needs mechanical re-crimping or reinforcement every so many uses to prevent it). Every operating session is different and comes with slightly different challenges and experiences.

So, in my way of thinking, the risk tolerance can vary based on the operational style rather than the generation. I imagine this topic would be relatively unimportant if the group were about a 6CL6 transmitter.