To those divers using a spreadsheet because they're concerned about a dive log software company going out of business I will say this: There is dive software such as Subsurface that uses universal data files that can be exported in a format that can be imported into spreadsheets or other dive company software. Perhaps more importantly, Subsurface in particular as well as probably others- runs locally and offers backup storage in their cloud- but if they should disappear one day the software will continue to run, and the data is also saved to your local computer which can be backed up to the cloud to services such as Google Drive.
There are numerous advantages of using dive log software over spreadsheets- easy to use interface to enter and view data, you can attach photos and sometimes even videos to individual dives- I tend to take pictures of the dive briefing photos and add those, in Subsurface you can enter GPS coordinates or make a good guess using the built in map and viola.. there's a map of the world with dive flags showing all the places you've been. Zoom in, click on one and you are brought right to the log of that dive- or multiple dives will highlight if they are the same dive site. Try THAT with your spreadsheet as well as automatic calculation of your SAC or RMV if you're using air integration, as well as automatic import from your dive computer of data including but not limited to your EAN %, time of dive, temperature, and of course depth and bottom times.
Software such as Subsurface include an app so you've got all that information right there on your phone, to show to a dive operator your recent dive history or to check in real time for things such as dive site particulars, weights last used, etc.
It goes without saying that a paper logbook does none of those things automatically and is much more difficult to store and back up and is so technologically backwards it isn't even a practical consideration anymore.