I have been using open office for many years, and was a user of "as-easy-as" before that.
W10 is no longer safe to use after the end of support data mentioned in the OP. Why? No more security updates. Those here manage data which must be kept secure, and after the above date, no one can consider W10 secure, period. If your machine runs W10, it should runs W11 as well. Whether or not your machine is secure is another matter (hardware security, software security, physical security).