Qt5 removal has several sub-trackers for packages depending on the real crusty 
stuff. One of them is for Qt5Script, which was only ever provided as a porting 
aid from Qt4, is deprecated since Qt 5.5, and last commit in upstream dev repo 
happened in 2021-10-26. [1]

These packages will be last-rited soon, save for someone taking over 
responsibility for them.

media-gfx/opentoonz:
    - https://bugs.gentoo.org/922311
    - Upstream responsive, but seem to need help getting it sorted
    - No response from ::gentoo maintainer since 2024-01-17
    - Many open bugs (how many are still relevant, though?)

media-tv/mythtv:
    - https://bugs.gentoo.org/915800
    - Qt6 support in CMake build system in git master
    - No response from ::gentoo maintainer since 2023-10-15
    - Many open bugs (how many are still relevant, though?)

net-analyzer/ostinato:
    - https://bugs.gentoo.org/922306
    - No response from ::gentoo maintainer since 2024-01-17
    - Many open bugs, unaddressed version bump
    - ... gone closed source, => last-rites inevitable?

[1] https://bugs.gentoo.org/915779