Elon Musk admitted that it may be hard to shoehorn future FSD versions into older HW3 vehicles, so Tesla will 'take care' of those who bought them with free HW4 computer upgrades.https://www.notebookcheck.net/Tesla-promises-free-HW4-upgrade-retrofits-if-it-can-t-make-HW3-vehicles-run-unsupervised-FSD.907178.0.html
Never use acronyms in titles.
Always use acronyms in titles.