In the past I've swapped out PCs for Chromebooks and thin client terminals.
A more modern trend could be to use SharePoint365 instead of on premises file servers along with lots of SaaS. However that's just moving the problem elsewhere...
I have also swapped Intel Xeon servers for AMD Epyc as they used a lot less power along with replacing hybrid SANs with Pure flash arrays.
On the Meraki side moving stacks from dual PSU MS models to C9300s with power stacking and therefore fewer PSUs could help.
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