Wouldn't it prevent people writing GPL2 software from using it, as the anti-tivoization would not be GPL2 no additional restrictions clause friendly? See the GPL FAQ compatibility chart [1], bottom left. The case I'm thinking of is where if you fork somebody else's GPL2 project and don't expect to be able to ask them to relicense (e.g. code from a company that no longer exists).

[1]: https://www.gnu.org/licenses/gpl-faq.html#gpl-compat-matrix