I wouldn't replace the wp and thermostat strictly due to having the radiator off. Access to both is very good with the radiator in place (simply unscrew/remove the fan). The fact that the coolant is already drained would be a stronger argument for me, but I would only replace them if I was confident they were original or they were replaced with cheap aftermarket parts.

ISTA-D is a newer version of INPA that functions well on modern Windows operating systems. I use mine on a Win10 Pro laptop. I find it much more intuitive than INPA. There's a whole forum on bimmerfest dedicated to software/coding.

I have come to the conclusion that BMW hoses are of very high quality, so I no longer replace them preemptively. In fact, you can buy o-ring kits from a guy on ebay and simply replace the sealing o-rings to prevent leaks. My '99 e46 still has mostly original hoses in place and they feel/look fine.

AM.

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E70 2010 3.0 M57 AT Titanium Silver with Black Leather
E53 2004 3.0 M54 AT Toledo Blue with Gray Leather
E83 2008 3.0 N52 AT Silver Gray Metallic with Black Vinyl
E46 1999 2.8 M52TU 5MT Black with Tan Leather 250K+ miles (Sold, but not forgotten)