Our society isn't really set up in a way that suicide is accepted so, I expect a great many people won't be able to say goodbye officially- unless they have incredibly understanding loved ones and feel confident they won't interfere with an attempt. I guess that's what notes left behind are for. To try and answer their questions.
Seems like some people sometimes do still try to make some nice memories with their loved ones before they go. So, they at least have that to look back fondly on. Some go the other way of trying to estrange everyone long before they go- because, maybe they won't miss someone who wasn't around anyway quite so much.
There can be a whole lot of boring shit to sort out too- if you feel troubled by it landing on relatives to sort out. Debts to clear, tax returns to make up to date, probably a good idea to make a will. Either leave it to relatives to sort through posessions, start clearing out stuff ourselves- although, that's quite a big red flag. Or, arrange for a house clearance company to deal with it all- through your will. Writing down information about bills, service providers, access to social media. Maybe pre-pay for a funeral or direct burial/cremation or, leave wishes behind and hope they're followed. Those of us employed may wish to try and make it as easy as possible on our employers.
Turns out dying in a considerate way that doesn't inconvenience others is just as much of a pain in the arse and full of paperwork as living! Makes sense it would be just as shit and tedious as living.
Or, we could just take the attitude of f*ck it! None of it will be my problem soon. Leave it to some other poor sod to deal with.