Ironically synthetic cork would be much better used in high end bottles, as you don’t have th problem of one occasionally disintegrating and ruining a bottle that’s been maturing for decades. The amount of speciality products around wine corks is prettty insane, all the various removal devices and sealers, etc. A simple, impervious (Mylar lined?) screw top would be the actual best for both practical and “archival” purposes.