While you're not wrong, aliasing tech (or even "high-tech") to mean exclusively software seems quite insulting to the rest of technologies.

Here’s a proposal:

“Technology” means the same thing it always has, but the abbreviation “Tech” is slang for computing, the subject of the current industrial revolution.

Here's an even better proposal - lets try immeasurably hard to stop re-inventing words and maybe use words that people would generally understand without an accompanying definition. Where, for instance, software actually means software and tech actually means technology. :p

That's very nice, but "Tech" sometimes means an industry now, not the technology itself. Same for software. There is software the code, and Software the industry. Nobody invented a new word, but we have to understand what we're talking about in context.