I was always under the impression that mattresses should be changed every 7 years or so. I mean, that's a lot of use over a long period of time! A quick Google suggests a lifespan of 7 to 10 years is about right. One article on this topic is here:
In all fairness, there was not much else to watch.
EDIT: obviously there was a lot one could watch, but nothing new, especially on UK terrestrial TV, and even the streaming providers didn't have a lot going on. There were exceptions of course but the general consensus in pubs was that the telly was crap. We didn't even get Kelly's Heroes or The Great Escape this year...
The SOLAS regulations that came into effect were mainly around lifeboat provision.
One cannot build a liner with full compartmentalisation, and nothing in the two Enquiries said otherwise. Titanic wasn't a warship. No other civilian ship - even today - has fully watertight compartments.
It didn't sink because of its design. It sank because it was driven at 22.5 knots into an iceberg. If you want to know more, read the book I linked in my original reply to OP or visit Encyclopedia Titanica.
That was absolutely not an issue. Titanic was a 4 compartment ship: any 4 compartments could be flooded without the ship sinking. Thus was WAY superior to the vast majority of ships sailing in 1912. Her design was superb.
When she hit the iceberg, 5 compartments were holed. No-one foresaw such severe damage as a possibility and it only happened because of the unique circumstances of the collision (actually, the alliision) with the 'berg.
In short, RMS Titanic was designed and built superbly.
There was nothing wrong with RMS Titanic. Her first sister, RMS Olympic, trundled along until being scapped in 1936 after the merger with Cunard. The issue with the Titanic was that she was driven into an iceberg.
EDIT 2: I've been a Titanorak for decades and used to post regularly on Reddit but I'm past all that now. I'm not an expert. If you want to read the opinions of experts, visit Encyclopedia Titanica and peruse the articles there. Avoid books pushing conspiracy theories (coal fire damage, swapped ships, etc.) and go to the original source material: the British and American Enquiries, both of which are available online. You'll have a blast and enjoy the rabbit holes, and perhaps even make new friends; I did!
Many Western European countries too, such as Belgium, France, the Netherlands and Spain!