This really depends on how you define tech... Is a static website made with SquareSpace tech? Is an excel file tech? I'd argue yes, and if so, then I'd bet that number is much higher than 80%.
What low code really represents is making automation more accessible for more common tasks without knowing how to develop software. Zapier but for more complex tasks.
20 years ago you had apps like Dreamweaver or Frontpage that enabled this for many people to do static sites like a square space now does dynamic ones.
Sadly though, if history is any teacher, at some point these incremental improvements will create larger low code companies and further consolidate more of the web into a few bigger providers.
Lowcode isn’t designed to replace all code, it’s designed to replace boilerplate CRUD apps with only a thin bit of logic. Often these are the internal apps too that aren’t worth the investment of a “fully coded” solution.