There is a cult around the the FR and WHR which I don’t buy into. I suspect people remember what these lines were once like and turn a blind eye to what they are today. Be clear I’m not criticising FWHR for being tourist lines, I’m just trying to point out that the nature of these lines in 2018 is quite different to say in 1985 when I last visited. Too many rose-tinted spectacles worn on this forum.
Obviously your recollection of the FR in the 1980's is markedly different to mine. What I recall of the 1980s is a line that was struggling financially with the costs of rebuilding, and was clearly showing it. The generally-run-down and decrepit feeling, the varnished plywood coaches, tin-cars with ex-bus seating, the almost-daily breakdowns, the almost total lack of regard for anything historic if it didn't earn money (e.g. removing the beading from the UK's very-first bogie coaches), the "square" Earl, the controversial redevelopment of Harbour station, and the truly appalling levels of customer service ("pack 'em in and ignore 'em" being the order of the day during high summer).
Too right that the FR of today is markedly different. A railway that looks both cared-for, and cares for the comfort of its passengers. A thriving Heritage Group that is actively supported by the railway's management. The bogie-cars and bug-boxes lovingly restored to original condition. DLG built to traditional profile. Welsh Pony being restored. The recreation of lost historic locos and vehicles (the single Fairlie, Spooners boat, the curly-roof van, etc etc). The careful restoration of historic buildings, such as at Dinas, Boston Lodge, Coed-y-Bleiddiau, etc. The annual and popular Vintage weekend. The gravity slate trains. The interpretation panels at various stations, and in some of the historic coaches, to explain their history. Next year Waunfawr will be rebuilt in historic NWNG style. The skills gained in restoring the historic coaches has been used to build new coaches using the same techniques, enabling the 1980's tin-cars to be phased-out in favour of coaches that, although modern, have a very historic feel (many passengers are very surprised to discover that the coach they think is a hundred years old was only built a couple of years ago, and the new pulman observation cars in particular are very popular).
The very constrained station sites at both Porthmadog and Blaenau have prevented the provision of a proper museum (a long-felt want). However, the new station at Caernarfon has been purpose-built with an exhibition space that will be used to highlight the railway's history.
Yes, the F&WHR is undoubtedly a tourist line, but this was no-less true in the 1980s. The major difference between the 1980s and today is that the FR is now a lot more careful and appreciative of its heritage than it was in the 1980s, and is doing far more to preserve it and show-case it than was the case in the 1980s. (The same is true of other heritage lines that have come of age. I can remember being quite appalled by some of the things the Bluebell were doing at Sheffield Park in the 1980s, for example, whereas more recent developments have been far more in keeping).
To be honest, I am quite staggered that you seem to prefer the FR of the 1980s to that of today. Just what was it that you preferred about the FR of the 1980's?