Why not? Car producers are begging for years for clear guidelines so they can develop solid plans instead of having to speculate how long they need to keep ICEs in parallel.
It's politicians bought by oil lobbyists (and a few bad apples in the industry refusing to acknowledge reality - often not even cas manufacturers themselves but people in their supply chain) that lie to us 24/7 allegedly protecting the very same producers.
Decryption isn't a problem if you use the systemd hooks when creating your initrams. They try to decrypt every given luks volume with the first key provided and only ask for additional keys if that fails.
I have 3 disks in a btrfs raid setup, 4 partitions (1 for the raid setup on each, plus a swap partition on the biggest disk), all encrypted with the same password.
No script needed, just add
rd.luks.name=<UUID1>=cryptroot1 rd.luks.name=<UUID2>=cryptroot2 rd.luks.name=<UUID3>=cryptroot3 rd.luks.name=<UUID4>=cryptswap
to your kernel parameters and unlock all 4 with one password at boot.