The cost of hardware, software and energy to run them is approaching zero.
Those who state that Moore’s Law is no longer relevant miss the point that it is the exponential reduction in the cost of computation that matters, not the efficiency of a chip. And the cost of computation has been a smooth sailing halving every 2 years for over a century before Moore was around.
It is reasonable to assume that the blocksize could easily cater for 3000 TPS (3 times current Visa numbers) within 15 years even with slower than historical performance increases.
Add 2nd layer solutions with all the bells and whistles fine. But do not strong arm the network into using it. This is supposed to be a free and voluntary market. Let it decide for itself.