In the history of crypto$ what is the average profitable lifetime of GPUs ASICs

[samadamsbeer]

In the history of cryptocurrencies - what is the average profitable lifetime of a GPU or ASIC? This assumes you mine alts with your miners always switching to the most profitable. I assume ASICs have a shorter lifespan but I am interested to hear actual anecdotes.

[Hydrogen]

Good question. If anyone researches this, also try to find out how much it costs to design and build a ASIC/GPU line of silicon, proportional to the price of how much ASICs and GPUs are sold for.

Going by memory, I think the past average to break even was around 6 months, without factoring in electricity costs.