Finishing a beloved series of any kind is never easy and One Foot in the Grave isn't immune from that. Before continuing any further, while I don't like giving away spoilers in my reviews, I need to establish one thing immediately: Victor dies. Clearly doesn't think of this as any kind of secret, it's written very plainly in their own mini overview of the episode. What I won't reveal is HOW that happens.
I will touch on overall reaction to it and the episode in general. Inevitably public opinion was and to this day remains very much divided. Personally, I think it's a slightly ironic but fitting ending that suits the tone of Victor Meldrew and the series in general, with audiences left to make up their own mind over Margaret's decisions (I'll go no further there) towards the end of the episode.
I feel that the episode's format of moving between the present and the past works well, while the closing montage is a lovely touch on two levels: One Foot ends on a relatively jolly note after an inevitable somberness at many points, whilst we finally get to see some of the more ridiculous things that Victor would often moan about after he got home later.
This show went out on top, David Renwick did absolutely the right thing in ending the series in a way that meant he couldn't be pestered into bringing back, inevitably diluting a masterwork of not only his career, but also televised situation comedy. As Richard Wilson said at the time: "Goodbye, Victor."