Let me rattle off the reasons that come to mind.
New software or hardware calls for some amount of change, and lawyers – like all people – generally dislike change (See my post of May 30, 2006 on the difficulties of change.).
It is hard to calculate with conviction technology’s return on investment (See my post of July 31, 2005 on implausible ROI calculations.).
The technology on offer today will be obsolete tomorrow, so why invest now?
Internal technology support (IT/IS) and procedures, like coping with leaches, can be painful, bloody and take a lot out of you (See my posts of Dec. 7, 2005 and April 26, 2006.).
While the pain of learning and changing is immediate, the pleasure of productivity shimmers far off and away (See my post of May 14, 2005 regarding net present value.).
Technology in the past strutted and hyped, so its credibility is now tattered.
Much technology offers a collective benefit that surpasses any one individual’s benefit (See my post of March 5, 2005,).