This paper discusses the need to preserve interfaces for early DH projects. It is a slightly expanded version of the abstract that will appear in the conference book of abstracts. The full version of the paper has been published by Digital Scholarship in the Humanities at https://academic.oup.com/dsh/articleabstract/ doi/10.1093/llc/fqz081/5670586. I am therefore not able to upload that paper to this repository, for copyright reasons. But please do read the full paper if you have access to it.