Historical clue formulations

• Advantageous — 2022-12-16
• Worth having — 2015-06-09
• Of service — 2012-06-06
• Good for something — 2011-09-04
• Practical — 2005-11-08
• Earning one's keep, say — 2004-06-27
• Beneficial — 2003-01-28
• Employable — 2001-03-23