2021 has almost gone, I haven't written on my blog almost all year, but there has been progress! I've made a bunch of small contributions this year to OpenSees (see all contributions here) but two big ones: a new material model for high-cyclic analysis of sands (SANISAND-MS with my collaborators at TU Delft, NGI and Bristol, see here) and added isogeometric analysis (IGA) of shells capabilities. This last contribution is very recent and is still (as of writing this) in pull request mode. I'll let some time pass, for possible review, before I definitely merge into main OpenSees.