Most people would have heard the saying “jack of all trades, master of none”. I think there is a danger in business to overpromise and under-deliver. By trying to fulfil every challenge your client throws at you, you risk over-committing yourself big time.
Not so long ago, when I was a spritely 21 year old I worked for a large Managed Services IT firm. We had a brilliant team based on a client site full time. We look care of everything from Windows desktops to telecoms. There was a trend of having to know little about lots – Covering different systems and environments; one minute learning how to patch a phone to a switch, the next sorting out a user who couldn’t log-on to their machine. I never quite got this – We were busy doing adequate jobs up until a point, but when anything serious was encountered the whole service fell apart. We had to wait for a more senior engineer to be drafted in. The customer had to wait.