RE: Other options, I think it is prudent to have (and support) new options. Tape capture really isn't too complicated, and I've had more than my share of flaky ancient A/V equipment and I'd just rather not bother with it if possible

Deinterlacing and a variety of other helpful effects can be done in a video editor like Davinci Resolve (even the Free version should support it via https://github.com/NatronGitHub/openfx-misc). No need to lengthen the analog signal chain for that.
RE: DVD Recorders and their comb filters - you may also be getting some noise reduction on the side.