In my work jpegs are only used for editing, approvals, and interntet release for press use.Picture Libraries, Magazines, the Publishing and Repro. industries are all now quite happy with jpgs. The difference between jpg. at the lowest compression rate and tiff is minimal at best and impossible to see at worst. I've been sending out jpgs. for use as cover images for glossy magazines, A3 double page spreads, billboards and high end advertising campaigns for years. Virtually every reproduced image you see is printed from a jpg.
For all retouching, advertising, marketing, packaging use only raw or tiffs are used.
Also these are huge files shot on medium format digital backs mostly.
I store my stuff in raw and tiffs on multiple hard drives, the clients store images in tiffs and jpegs on dvds, external hard drives and servers. For me it depends on what they will do with the images, if they are going to leave them as they are jpegs are fine, if at some point they want play with them I would store tiffs.