I had the ARCAM CD23T a dozen years ago in a prior system, so I know it’s strengths and warts very well.
Decision tree:
(1) IF YOU LIKE THE ARCAM bespoke signature sound , ( a fine but important distinction and thus first consideration ,,,,) then it is worth the repair cost, it was a great DAC for spinners of ITS era, ( emphasis added)
(2) Not insignificant current repair costs are not assurance of future proofing against continued new repair costs, This needs to be first assessed as a deterrent and high risk investment. Be aware that the laser unit replacement part may prove difficult in a 20+ year old spinner.
it was for this reason I upgraded 10 years ago to a REGA ISIS VALVE cdp/ DAC who has two matched serial number laser units reserved for each owner stored for you back at REGA. ( the ISIS is also a very big step up in performance comparatively)