Michael Fryd
Forum Pro
It's an interesting question as to what the best philosophy is. When technology is evolving, one might not want to keep the same gear for 20 years.my Elinchrom strobes - some over 20 years old. No failures. No repairs, always work.Not a super extensive review, but they brought up some good points.
https://fstoppers.com/originals/profoto-b1-vs-godox-ad600-flash-photography-155679
Someone find one this thread and update it in 2036 and let me know how that Godox is doing... I'll bet my Eli's will be working well. Betcha those Profotos will be going strong too.
The Canon EOS D20 camera I bought 12 years ago still works as good as it did new. Technology has long passed it by, and I no longer shoot with it.
If you think that lighting technology won't change in the next 20 years, then a long term investment may be wise. If you are looking forwards to LED modeling lights that can double as video lights, ultra short flash durations, high speed sync compatible with future cameras, smarter remote systems, integrated metering, or other technologies, you may want to base your choice on a shorter product lifetime.
There is also the issue of cost vs reliability. Even the most reliable systems can fail. Knock a multi-thousand dollar light into a swimming pool, or the ocean, and it likely will stop working. Even without abuse, a reliable product can experience a failure.
Depending on your needs, it might be acceptable to keep a spare light around and swap it in if needed. If the spare light costs $2,000, you might want to skip the spare, and hope you don't see a failure. if the spare light costs $200, it might be worth having one around.
Assume you have 3 lights and you keep them for 15 years. With an expensive brand, you might have one failure, and you might be down to two lights for a few weeks while it is being repaired. With a cheap light, you might have 2 (or even three failures) over those 15 years. You swap in a spare light, and you are back up in 5 minutes. Send the failed light for repair, and you have it back within a week for about $60.
For some people, the reliability of a cheap system with a spare, is actually better than an expensive system without the spare. On the other hand, with the cheap system you've missed three shots over ten years, vs one missed shot with the expensive system. If you are in a situation where you can't easily reshoot then you might be better off with the expensive system.
I once did a shot for a CD booklet. It involved the musicians actually smashing instruments to pieces. If my strobe had failed on that shot we didn't have extra instruments for a reshoot. When I am shooting clothing for a catalog, it isn't a problem. If the strobe failed I would ask the model to take a 2 minute break. I'd swap in a new light, and then we would re-shoot the last shot and continue.
There are lots of different types of photographers, with many different needs. There is no single solution that's right for everyone.