John Sheridan’s side were disappointed to draw 1-1 with the Dons after having the better of the chances on Tuesday night in front of 6,900 fans.
But their mood will have improved when they saw the other League Two results, which all went in their favour.
Fellow promotion hopefuls Newport County, Luton Town and Exeter City all failed to win, which has left Argyle with a three-point cushion in the final play-off spot with just three games to go.
The Greens had taken a deserved lead against Wimbledon 10 minutes into the second half when Anthony O’Connor continued his recent goal-scoring form by netting at the far post from a set piece.
But Argyle’s lead did not last long as eight minutes later the visitors, who have never lost at Home Park, equalised through Adebayo Azeez.
The Pilgrims, with Bobby Reid impressing, created plenty of chances but were unable to put them away.
Afterwards manager Sheridan said: “Gutted we didn’t get the three points. That’s the best we’ve played for a while.
“We played really well but I’d rather have played poorly and won at this stage of the season.”
Argyle face a long trip this weekend when they travel to Carlisle.