Developments in the field of bitcoin/crypto mining never ceased nor stopped, it has been a continual effort to find ways to better the mining rigs to make the system more efficient both in process and power consumption.  People have been trying to lower down everything, from cost to the power consumption, and i tell you, there has been a lot of improvement in this area.

Secondly, it is not only the systems and the hardware that are being developed (in the sense of cryptocurrency in general). But developers has been trying to find a much more faster and efficient means of proofing a transaction so that they are verified at a much faster speed and blocks are created in a shorter process.

So i'm sure that we are all set to see how mining methodologies will revolutionize soon.