Quite honestly I don't think menuhax or browserhax are dead in the slightest... Quote from yellows8 github "The Home Menu code changes
just added a "if(decompressed_size_from_lzheader > 0x150000){exit};" check after loading a theme, prior to decompression." Notice the word just (yes it's italicised on github) meaning there's a possible workaround... Or, and this is could be the more likely answer, it's for people who can downgrade/refuse the home menu update, since the code does the same thing with just a check to make the hax not work anymore... Meaning once downgrade is possible, just use a CIA manager to downgrade the homemenu to an exploitable version to use menuhax with

who knows what yellow8 has in store for us in the future