The market for wall-warts that charge devices via USB is now projected to be worth an additional US$9.9 billion by 2028. It is a sector of the overall wall-charger market, which is thought to grow by up to $23 billion over the same period. Even given the economic effects of the Covid-19 pandemic, various regions are thought to be capable of adding hundreds of millions of USD to its value.
https://www.notebookcheck.net/The-global-USB-charger-market-may-be-worth-nearly-US-10-billion-by-2024.470238.0.html