David switched to OTB games rather than online, which is very important. I have always said that OTB play is hugely different (and infinitely better) than online. The physical presence of the board, pieces and an opponent forces you to concentrate and try harder.
Here we analyse two games of his, I quite liked his treatment of the typical structure arising from different openings (Caro-Kann, Reti, Scandinavian) here:
In his White game David messed up the opening but then defended well and was richly rewarded!