Of course I can only write about my experience. I have been building cabinets for close to 70 years so I have managed to buy more than enough spare tools. Trust me, I feel the pain of everyone who depends on a single tool of each type, be it a saw, drill or router.
My own business plan is to have enough tools that I can reduce time wasted changing a given tool from one function to another. Extra tools do not get paid overtime, nor do they get benefits.
It is not clear to me if you employ other people to use your tools. I have 6 other cabinet makers on my payroll, in addition to an office and support staff. All but me are covered by works comp laws. The investment in the 2 new TS55REQ is a drop in the bucket compared to the consequences of a loss of my workers comp insurance as a result of allowing an employee to use a tool I had been notified was subject to recall. I seriously doubt my claiming the TS55REQ worked safely as designed until it did not retract would influence a court. So I did the pragmatic thing and stopped allowing any use of the saws.
One suggestion since you have TS55-style blades would be to accept the refund for your TS55REQ and find a decent used TS55 which is not subject to a recall.
My own plan had been to buy a few more used TS55 from people I know who wanted to own a TS55REQ. The first day of the recall I sold one of those TS55 back to the pal who had owned it when he had to send his TS55REQ back to Festool. I do not want to be selfish. In the short term, the value of TS55EQ has shot through the roof at the moment. I assume none are left in dealer inventory, so those who bought recon TS55 must be overjoyed now.
I own 2 TS75 and all of the cabinet makers working for me has a personal TS75. None of us consider those a direct replacement for a TS55 on a daily basis. To us the TS75 is intended for different tasks, which do not occur all that often when we build cabinets. Of course all of us build other things in addition to the cabinets which provide our livings.
Festool will make all this right by us eventually. This recall added to the CSA situation of the Mini and Midi has got to frustrate many users. I do not own either of those CT and all of my CT22 and CT36 have UL stickers which are required for California employers.