(Sorry about the long arse post)
Lmao I deliberately wasn't answering this to give someone else the chance, but let's be real, that probably wasn't going to happen!
I think it will survive, but not in the same form that it does today. Simply because it's a living Dharma and it therefore continues to change, evolve, formulate new ideas and reform itself as time goes on. This is something that it has done over the last few millenia and as long as that spirit of change and reform is there, it will continue to not only live, but thrive. It helps that the texts allow for this change.
Lol my mentor always quotes the slogan for the former Orange Mobile Network: "The future's bright, the future's orange!"
And orange (or saffron) is a significant colour in all 4 Dharmic traditions (Hinduism, Buddhism, Jainism and Sikhism). So in effect he's saying that these traditions cannot be fobbed off easily and their ideas will become firmly established in greater society. We already see that with things like Yoga, meditation etc.
They've all endured tremendous shocks and attacks in history and have all survived. In the case of Hinduism, Buddhism and Sikhism, I'd argue that they've become stronger as a result of those shocks.
Back to Hinduism, I think its pluralistic nature and diversity, rather than it being a hindrance, has been and will continue to be something that keeps it alive because it offers something for everybody.
I remember seeing a video of a Christian bishop actually agreeing with this. He said that there's the extremely superstitious and manipulative part which caters to the illiterate villager in India, but there's also the extremely abstract and brilliant philosophy with everything in between.
I think the biggest challenges right now are social; the broader samaj NEEDS to get rid of Jaati pratha (caste system) and the subjugation of women. But as I say, these are social problems rather than religious, because no matter how many famous and influential saints, sages, gurus and swamis preach against these injustices using quotes, examples and teachings from the Hindu scriptures, it won't disappear until there's a movement amongst the masses.
But I'm an optimist - I see change happening all the time and a stirring up amongst society to speak out against these issues. E.g.: the recent cases of women fighting for (and winning) the right to be allowed to enter certain temples and shrines which they were barred from. Also, there are organizations and temple trusts that are training Dalits up to become priests, remembering that some time ago (and even today in some places) they weren't even allowed to go near a temple.
And just to pre-empt the attempt of
@Dima-Blackburn to cheekily reduce this long-arse post down to a few lines (like I did with him
): yes, it will last, but most likely in a different form to how it is today and the renaissance will happen naturally - in fact I'd argue that the seeds have already been sown.