A few (not so recent) preprints:
Parity splits by triple point distances in $X$-trees dvi pdf
Binomial posets with non-isomorphic intervals dvi pdf
Multinomial expressions summation asymptotic approximations dvi pdf



In 2024, Vic Reiner asked about an old result concerning the property of being a koszulalgebra for homogeneous algebras with quadratic non-commutative Gröner bases. The proof seems never to have been written down carefully. I tried to do this (actually, giving two proofs of the result asked for in the original question, and also explaining a bit about the general relation between filtrations and subquotients of homologies):

Low degrees in a Gröbner basis may force the Koszul property.  dvi  pdf