no, actually, easyblocks still provide the `extra_options` as a list of tuples, cfr. https://github.com/hpcugent/easybuild-easyblocks/blob/master/easybuild/easyblocks/s/slepc.py#L56, https://github.com/hpcugent/easybuild-easyblocks/blob/master/easybuild/easyblocks/w/wrf.py#L62, etc.

if we deprecate this, we need to clean up all existing easyblock using `extra_options` (38 easyblocks), and keep this in mind in current and future PRs...