This question is related to the fact that I have no understanding for what reason need to increase the gas limit, what will the increase affect and why it is impossible to leave the limit as it is? I would like to hear the answer in a fairly simple, but as complete as possible form, what is gas, so that simple users of the network can understand
Gas represents computational cost related to a transaction, e.g. gas for basic transactions are about 10,000 units, where as more costly transactions that invoke smart contracts can cost a lot more.
Currently there is a fixed gas limit per operation of 400,000 units, and a fixed gas limit per block of 4,000,000 units. This is quite limiting for transactions (especially smart contract calls), for example currently a single block can only contain ~400 basic transactions (4,000,000 / 10,000) which equates to a TPS of about 6.66.
The gas limits are quite low in my opinion, and an increase would greatly help to improve TPS and viability of more complex smart contracts.