I'm sorry but I wouldn't call certificates with a lifetime of 90 days practical and I'm a developer.
Let's Encrypt is still far from being convenient and usable for small companies or individuals that don't want to manage infrastructures and administration like writing a cron job that refreshes your certificate.
Yes that one liner takes so much effort to write [EDIT: copy from one of the bazillion articles that have already done it for you]. That's why we can't have security. It takes too much effort.
uMatrix offers a feature to randomly pick a UA every 5 minutes from a set of known UAs. This works, although GMail might complain about the UA being too old. Reloading GMail resolves that.
EDIT: Replied to the wrong parent, please ignore in this context.
Let's Encrypt is still far from being convenient and usable for small companies or individuals that don't want to manage infrastructures and administration like writing a cron job that refreshes your certificate.