I've got the following former closet window which until recently had an thick framed operable wooden window. The window jams were made from old growth redwood and are fine, despite many years with failing paint. The failed paint is now removed, but the window is beyond repair.
There's no need for this window to be operable any more. What options are there for maximizing light through the opening? Can an insulated glass panel be inserted directly into the jamb (with no frame rail or stiles around it)? If so how would it be glazed to avoid long term cracking as the building shifts or earthquakes happen?