[2021] Is there planned to implement Conveyers, Cargo lifts and steam drilling machines?

Conveyor belts are planned long-term, but only with a very limited scope. They will likely only work over a short distance in a factory. No plans for minecarts yet, would likely be part of trains, which is unlikely before end of EA at least.

A cargo lift is not specifically planned, but one way to provide a replacement for when item teleporting is fixed.

We do not have plans for an early machine era digging machine at this point.

Water transport vehicles were announced a month back and are coming soon.

Both carts and stockpiles, yes.

No, that I don't mean :)

The current use of carts and stockpiles to fast-transfer items from the bottom of a mine to the top or to replace usage of carts by teleporting over the world is not intended and considered an exploit. Insofar this will be fixed and severely restricted to only be what it is intended to be, a small range tool for resorting your stockpiles.

Newer and more specialized storage options also will work differently in a way I can't yet elaborate on.