I don't want to sound too dismissive, but all these arguments have been brought up time and again. The move from assembler to high level languages. The introduction of OOP. Component architecture / COM / CORBA / etc. The development of the web browser. The introduction of Java. 2018 isn't "the start of the decline", it's just another data point on a line that leads from, y'know, Elite 8-bit on a single tape in a few…
> If you plot the line it's probably still curving up and I'm not clear at which point (if ever) it would start bending the other way. I suspect when Moore‘s law ends and we cannot build substantially faster machines anymore.
The systems people worry more about memory usage for this reason, and prefer manual memory management.