Dave Packard, best I can tell, never kept a product, business, or building around for sentimental reasons. He also had no patience for unprofitable businesses.
Had he stopped aging in his 50’s or 60’s and stayed on as HP’s CEO through 2010, it is hard to speculate what he would have done. My guess, based on the cancellation of the Omega mainframe computer in the early 1970s, is that he would have passed on entering or staying in the higher volume, lower margin computer businesses which fueled a lot of HP’s growth in the 1990s and 2000’s. I also speculate he would have rejected the centralization necessary for scale in the computer server business, which broke the division model which had allowed HP successful growth in instruments and early computer in the 1960s and 1970s. The question is what would HP have invested in instead, perhaps the space Cisco now dominates? Even though HP had the tech, it’s not clear HP had the marketing to create the smartphone business.