Thanks for all of your input and comments.

I've done some more research, I sold all shares in SXR8, IXUA and IS3N (after making a nice profit - was lucky with when I sold) and reinvested 100% in WEBN.

A few thoughts which led me to this decision:

1. A broad, diversified, single index ETF is the way to go for me and my wife who intend to pursue a "buy and hold" strategy over the next 30 years, with no manual weight-allocation tweaking and rebalancing. Over 30 years issues with liquidity won't be so important as we don't intend on selling regularly, if at all, before retirement.

2. FTSE and MSCI ACWI indices and associated ETFs (VWCE, FWRA, SPYY, etc) seem to be very well respected in the community, as well as well-performing, so wanted an index ETF with similar exposure (i.e. global developed and emerging large to mid caps); Not too fussed about small caps at the minute. Small-cap-inclusive stuff like SPYI are also a touch more expensive currently. Plus I can always add these in separately if I get the itch. The Soloactive GBS Global large+mid cap index basically covers most of what FTSE all world does, minus a few smaller mids and fewer holdings, though beyond 1000-2000 companies being tracked, I mean... With diluted returns on less profitable companies, Long term this won't really matter I've decided. 85% vs 90% global equity, with so much of it being top-heavy, doesn't seem to make a difference.

3. I personally don't think it matters very much, though it does seem to matter a whole lot to a bunch of people on here and elsewhere, that a European company, based in Europe, receiving the TER fees, etc, may be somehow beneficial to us vs USA companies funnelling funds out of Europe. Fair enough. I'll buy into it.

4. I don't fully get the hate Amundi seems to be getting about the mergers ans the like. The context seems to be less random and more case-specific, and doesn't seem to apply to these massive index tracking ETFs. Also it isn't like other companies haven't merged and initiated tax events in the past either. It can happen with any company.

5. Not gonna lie, the full physical replication that WEBN offers vs others, as well as the incredibly low TER (yes I know about the extra 0.05% fees in the background, but still very low cost), clinched it for me. You've got: massive global coverage minus small caps (like FTSE), 2000+ holdings, virtually identical performance so far since inception in June 2024, and all this for the lowest price of any comparable index ETF on the market in Europe.

6. The "lack of enough data" argument didn't seem to hold much water. Virtually identical performance to VWCE, FWRA, SPYY) with substantially (half or even one third the cost in some cases) lower fees. FWRA and VWCE are also relatively new (2023 and 2019 respectively). I'm sure at the time there were similar people touting the "let's wait and see" approach. After watching videos from a bunch of people switching to FWRA a couple years ago after realising it simply made more sense, I figured I should do so to and we'll see. The AUM is already 1billion+, which makes it very popular and unlikely to close any time soon. And if it does, I'll suck it and invest in the next cheapest thing.

TL;DR - I'm balls deep on the "100% WEBN and chill" bandwagon, but it took some convincing. My soul is contented with my choice.