> Have there been new games where they haven't been able to do so and offer installation solely through the GOG dekstop client?
No... but GoG does not prevent the publisher from instituting their own launcher/DRM/malware scheme. See reviews at https://www.gog.com/en/game/horizon_zero_dawn_complete_editi... and https://www.gog.com/en/game/pathfinder_wrath_of_the_righteou...