...after 40+ years of 'chasing fi'....
Please yourself, and the mind between the ears you own.
Enjoy reading of others' systems and approaches; keep in mind 'they' may have a level of 'discretionary funds' you lack.
Ignore 70ish%, as it at the end of the day, Opinion based on what they have. The balance will be more useful and applicable to your 'quest'.
The space you place self and stuff in has an enormous effect on your system. Dealing with that may strike some as heresy, be it by treatment (or lack of) or the use of devices that either make 'sense' to your ears or is within your budget. Think of it as an ongoing 'experiment'.
Remember: Nothing you do is 'wrong'. It may not work 'correctly', but half of the 'fun' (as in most human relationships) is in 'The Chase'.
There is an addiction factor in 'The Chase'. Be aware, know when to 'cold turkey' yourself. Your cars' transmission IS more important than a new cartridge for the TT.
Do keep in mind and at the center of your personal 'Chase':
It's The Music, not the means. If most of what you hear sounds fine...
STOP.
Tread carefully afterwards with regards to 'enhancements', lest ye lose what ye hath attained.