--snip--
That's what scares me, having a hidden bug when using the tool to encrypt the seed or not being able to find a good version of the tool when I want to decrypt the seed in several years. That's why I'd need a very standardized and reliable tool to encrypt. BIP38 seemed perfect for that.
Not all tools is reliable, but OpenSSL (which mentioned on link i shared earlier) is one of most reliable cryptography tool you could find out there. AES also is most common encryption algorithm out there. Personally i find OpenSSL and AES rather more reliable than BIP 38 as long as i bother write down encryption parameter (although i just use default parameter) and OpenSSL version.
CD/DVD only have long lifespan if you buy good ones and store it properly. You might as well as buy specific storage which specially designed for long term archive, such as M-Disc or SanDisk Memory Vault.
I checked both of them that's too much for the human lifespan unless you can live more than 100yrs or only if you have family that you can inherit.
That's true, although i doubt it could last as long as their claim. Besides, it's not that expensive compared with regular CD/DVD so IMO you might as well as get more durable ones.