From the petition.parliament.uk web site:

Please #SaveOurWills! The Ministry of Justice proposes to digitise and then allow the destruction of original wills after 25 years. We call for the original wills to be preserved in perpetuity in line with current legislation. Do not agree to legislative changes that would allow the destruction of these documents.

1. We think costs of digital preservation and storage could be astronomical.

2. The loss of digital files may be more likely than the loss of physical documents, for example via file corruption and cyber attacks.

3. Flaws and errors made during the digitisation process may happen.

4. The proposed changes to legislation may set a detrimental precedent for the destruction of other archive collections.

5. Physical documents provide additional information, such as the materiality of the documents.

You can read more and even sign the petition (if you are a UK citizen) by first going to https://petition.parliament.uk/petitions/654081.